157389839 has 4 divisors (see below), whose sum is σ = 158522280. Its totient is φ = 156257400.

The previous prime is 157389833. The next prime is 157389853. The reversal of 157389839 is 938983751.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 157389839 - 2¹² = 157385743 is a prime.

It is a super-2 number, since 2×157389839² = 49543122840891842, 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 (157389833) 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, 566012 + ... + 566289.

It is an arithmetic number, because the mean of its divisors is an integer number (39630570).

Almost surely, 2^157389839 is an apocalyptic number.

157389839 is a deficient number, since it is larger than the sum of its proper divisors (1132441).

157389839 is a wasteful number, since it uses less digits than its factorization.

157389839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1132440.

The product of its digits is 1632960, while the sum is 53.

The square root of 157389839 is about 12545.5107110073. The cubic root of 157389839 is about 539.9152118820.

The spelling of 157389839 in words is "one hundred fifty-seven million, three hundred eighty-nine thousand, eight hundred thirty-nine".