151256989 has 8 divisors (see below), whose sum is σ = 165324320. Its totient is φ = 137537136.

The previous prime is 151256981. The next prime is 151257023. The reversal of 151256989 is 989652151.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 151256989 - 2³ = 151256981 is a prime.

It is a super-2 number, since 2×151256989² = 45757353442692242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151256981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85959 + ... + 87700.

It is an arithmetic number, because the mean of its divisors is an integer number (20665540).

Almost surely, 2^151256989 is an apocalyptic number.

It is an amenable number.

151256989 is a deficient number, since it is larger than the sum of its proper divisors (14067331).

151256989 is a wasteful number, since it uses less digits than its factorization.

151256989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173739.

The product of its digits is 194400, while the sum is 46.

The square root of 151256989 is about 12298.6580162227. The cubic root of 151256989 is about 532.8093248619.

The spelling of 151256989 in words is "one hundred fifty-one million, two hundred fifty-six thousand, nine hundred eighty-nine".