154678969 has 3 divisors (see below), whose sum is σ = 154691407. Its totient is φ = 154666532.

The previous prime is 154678949. The next prime is 154678987. The reversal of 154678969 is 969876451.

The square root of 154678969 is 12437.

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

154678969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 5546025 + 149132944 = 2355^2 + 12212^2 .

It is not a de Polignac number, because 154678969 - 2¹⁵ = 154646201 is a prime.

It is a super-2 number, since 2×154678969² = 47851166901805922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154678949) 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, 6219 + ... + 18655.

Almost surely, 2^154678969 is an apocalyptic number.

154678969 is the 12437-th square number.

154678969 is the 6219-th centered octagonal number.

It is an amenable number.

154678969 is a deficient number, since it is larger than the sum of its proper divisors (12438).

154678969 is an frugal number, since it uses more digits than its factorization.

154678969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24874 (or 12437 counting only the distinct ones).

The product of its digits is 3265920, while the sum is 55.

The cubic root of 154678969 is about 536.7974237840.

The spelling of 154678969 in words is "one hundred fifty-four million, six hundred seventy-eight thousand, nine hundred sixty-nine".