157942909 has 8 divisors (see below), whose sum is σ = 164938752. Its totient is φ = 150957840.

The previous prime is 157942879. The next prime is 157942921. The reversal of 157942909 is 909249751.

It is a happy number.

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 157942909 - 2¹³ = 157934717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157942009) 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, 46927 + ... + 50179.

It is an arithmetic number, because the mean of its divisors is an integer number (20617344).

Almost surely, 2^157942909 is an apocalyptic number.

It is an amenable number.

157942909 is a deficient number, since it is larger than the sum of its proper divisors (6995843).

157942909 is a wasteful number, since it uses less digits than its factorization.

157942909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5387.

The product of its (nonzero) digits is 204120, while the sum is 46.

The square root of 157942909 is about 12567.5339267495. The cubic root of 157942909 is about 540.5468956365.

It can be divided in two parts, 157942 and 909, that added together give a palindrome (158851).

The spelling of 157942909 in words is "one hundred fifty-seven million, nine hundred forty-two thousand, nine hundred nine".