156149893 has 2 divisors, whose sum is σ = 156149894. Its totient is φ = 156149892.

The previous prime is 156149867. The next prime is 156149897. The reversal of 156149893 is 398941651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130919364 + 25230529 = 11442^2 + 5023^2 .

It is a cyclic number.

It is not a de Polignac number, because 156149893 - 2⁹ = 156149381 is a prime.

It is a super-2 number, since 2×156149893² = 48765578167822898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (156149897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78074946 + 78074947.

It is an arithmetic number, because the mean of its divisors is an integer number (78074947).

Almost surely, 2^156149893 is an apocalyptic number.

It is an amenable number.

156149893 is a deficient number, since it is larger than the sum of its proper divisors (1).

156149893 is an equidigital number, since it uses as much as digits as its factorization.

156149893 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 46.

The square root of 156149893 is about 12495.9950784241. The cubic root of 156149893 is about 538.4936218042.

The spelling of 156149893 in words is "one hundred fifty-six million, one hundred forty-nine thousand, eight hundred ninety-three".