157909237 has 8 divisors (see below), whose sum is σ = 168281856. Its totient is φ = 147828912.

The previous prime is 157909223. The next prime is 157909253. The reversal of 157909237 is 732909751.

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

It is not a de Polignac number, because 157909237 - 2⁷ = 157909109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157909193 and 157909202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157909217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71958 + ... + 74119.

It is an arithmetic number, because the mean of its divisors is an integer number (21035232).

Almost surely, 2^157909237 is an apocalyptic number.

It is an amenable number.

157909237 is a deficient number, since it is larger than the sum of its proper divisors (10372619).

157909237 is a wasteful number, since it uses less digits than its factorization.

157909237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146147.

The product of its (nonzero) digits is 119070, while the sum is 43.

The square root of 157909237 is about 12566.1942130464. The cubic root of 157909237 is about 540.5084796696.

The spelling of 157909237 in words is "one hundred fifty-seven million, nine hundred nine thousand, two hundred thirty-seven".