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154579489 = 124332

154579489 has 3 divisors (see below), whose sum is σ = 154591923. Its totient is φ = 154567056.

The previous prime is 154579441. The next prime is 154579499. The reversal of 154579489 is 984975451.

The square root of 154579489 is 12433.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 20205025 + 134374464 = 4495^2 + 11592^2 .

It is not a de Polignac number, because 154579489 - 211 = 154577441 is a prime.

It is a super-2 number, since 2×1545794892 = 47789636839002242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154579409) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 6217 + ... + 18649.

It is an arithmetic number, because the mean of its divisors is an integer number (51530641).

Almost surely, 2154579489 is an apocalyptic number.

154579489 is the 12433-rd square number.

154579489 is the 6217-th centered octagonal number.

It is an amenable number.

154579489 is a deficient number, since it is larger than the sum of its proper divisors (12434).

154579489 is an frugal number, since it uses more digits than its factorization.

154579489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24866 (or 12433 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 52.

The cubic root of 154579489 is about 536.6823207416.

The spelling of 154579489 in words is "one hundred fifty-four million, five hundred seventy-nine thousand, four hundred eighty-nine".

Divisors: 1 12433 154579489