157020639 has 8 divisors (see below), whose sum is σ = 209442432. Its totient is φ = 104639640.

The previous prime is 157020629. The next prime is 157020659. The reversal of 157020639 is 936020751.

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

It is not a de Polignac number, because 157020639 - 2⁵ = 157020607 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157020629) 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 7 ways as a sum of consecutive naturals, for example, 342 + ... + 17724.

It is an arithmetic number, because the mean of its divisors is an integer number (26180304).

Almost surely, 2^157020639 is an apocalyptic number.

157020639 is a deficient number, since it is larger than the sum of its proper divisors (52421793).

157020639 is a wasteful number, since it uses less digits than its factorization.

157020639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20397.

The product of its (nonzero) digits is 11340, while the sum is 33.

The square root of 157020639 is about 12530.7876448370. The cubic root of 157020639 is about 539.4927094579.

The spelling of 157020639 in words is "one hundred fifty-seven million, twenty thousand, six hundred thirty-nine".