157987839 has 4 divisors (see below), whose sum is σ = 210650456. Its totient is φ = 105325224.

The previous prime is 157987813. The next prime is 157987847. The reversal of 157987839 is 938789751.

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

It is not a de Polignac number, because 157987839 - 2⁹ = 157987327 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 (157987849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26331304 + ... + 26331309.

It is an arithmetic number, because the mean of its divisors is an integer number (52662614).

Almost surely, 2^157987839 is an apocalyptic number.

157987839 is a deficient number, since it is larger than the sum of its proper divisors (52662617).

157987839 is an equidigital number, since it uses as much as digits as its factorization.

157987839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52662616.

The product of its digits is 3810240, while the sum is 57.

The square root of 157987839 is about 12569.3213420614. The cubic root of 157987839 is about 540.5981472134.

The spelling of 157987839 in words is "one hundred fifty-seven million, nine hundred eighty-seven thousand, eight hundred thirty-nine".