157956493 has 2 divisors, whose sum is σ = 157956494. Its totient is φ = 157956492.

The previous prime is 157956473. The next prime is 157956517. The reversal of 157956493 is 394659751.

157956493 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123698884 + 34257609 = 11122^2 + 5853^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157956493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157956473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78978246 + 78978247.

It is an arithmetic number, because the mean of its divisors is an integer number (78978247).

Almost surely, 2^157956493 is an apocalyptic number.

It is an amenable number.

157956493 is a deficient number, since it is larger than the sum of its proper divisors (1).

157956493 is an equidigital number, since it uses as much as digits as its factorization.

157956493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1020600, while the sum is 49.

The square root of 157956493 is about 12568.0743552861. The cubic root of 157956493 is about 540.5623919078.

The spelling of 157956493 in words is "one hundred fifty-seven million, nine hundred fifty-six thousand, four hundred ninety-three".