156967493 has 6 divisors (see below), whose sum is σ = 165664134. Its totient is φ = 148705704.

The previous prime is 156967469. The next prime is 156967513. The reversal of 156967493 is 394769651.

It can be written as a sum of positive squares in only one way, i.e., 156300004 + 667489 = 12502^2 + 817^2 .

It is a de Polignac number, because none of the positive numbers 2^k-156967493 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 (156967403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 217046 + ... + 217767.

It is an arithmetic number, because the mean of its divisors is an integer number (27610689).

Almost surely, 2^156967493 is an apocalyptic number.

It is an amenable number.

156967493 is a deficient number, since it is larger than the sum of its proper divisors (8696641).

156967493 is an equidigital number, since it uses as much as digits as its factorization.

156967493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434851 (or 434832 counting only the distinct ones).

The product of its digits is 1224720, while the sum is 50.

The square root of 156967493 is about 12528.6668484719. Note that the first 3 decimals coincide. The cubic root of 156967493 is about 539.4318361121.

The spelling of 156967493 in words is "one hundred fifty-six million, nine hundred sixty-seven thousand, four hundred ninety-three".