157872791 has 2 divisors, whose sum is σ = 157872792. Its totient is φ = 157872790.

The previous prime is 157872751. The next prime is 157872817. The reversal of 157872791 is 197278751.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 157872791 - 2¹⁰ = 157871767 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157872721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78936395 + 78936396.

It is an arithmetic number, because the mean of its divisors is an integer number (78936396).

Almost surely, 2^157872791 is an apocalyptic number.

157872791 is a deficient number, since it is larger than the sum of its proper divisors (1).

157872791 is an equidigital number, since it uses as much as digits as its factorization.

157872791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 47.

The square root of 157872791 is about 12564.7439687405. The cubic root of 157872791 is about 540.4668927256.

The spelling of 157872791 in words is "one hundred fifty-seven million, eight hundred seventy-two thousand, seven hundred ninety-one".