154885969 has 4 divisors (see below), whose sum is σ = 177012544. Its totient is φ = 132759396.

The previous prime is 154885943. The next prime is 154885993. The reversal of 154885969 is 969588451.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 154885969 - 2²³ = 146497361 is a prime.

It is a super-2 number, since 2×154885969² = 47979326786137922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (154885909) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11063277 + ... + 11063290.

It is an arithmetic number, because the mean of its divisors is an integer number (44253136).

Almost surely, 2^154885969 is an apocalyptic number.

It is an amenable number.

154885969 is a deficient number, since it is larger than the sum of its proper divisors (22126575).

154885969 is an equidigital number, since it uses as much as digits as its factorization.

154885969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22126574.

The product of its digits is 3110400, while the sum is 55.

The square root of 154885969 is about 12445.3191602305. The cubic root of 154885969 is about 537.0367744352.

The spelling of 154885969 in words is "one hundred fifty-four million, eight hundred eighty-five thousand, nine hundred sixty-nine".