156981841 has 2 divisors, whose sum is σ = 156981842. Its totient is φ = 156981840.

The previous prime is 156981829. The next prime is 156981917. The reversal of 156981841 is 148189651.

156981841 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., 87609600 + 69372241 = 9360^2 + 8329^2 .

It is a cyclic number.

It is not a de Polignac number, because 156981841 - 2⁵ = 156981809 is a prime.

It is not a weakly prime, because it can be changed into another prime (156981641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78490920 + 78490921.

It is an arithmetic number, because the mean of its divisors is an integer number (78490921).

Almost surely, 2^156981841 is an apocalyptic number.

It is an amenable number.

156981841 is a deficient number, since it is larger than the sum of its proper divisors (1).

156981841 is an equidigital number, since it uses as much as digits as its factorization.

156981841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 43.

The square root of 156981841 is about 12529.2394422008. The cubic root of 156981841 is about 539.4482716429.

The spelling of 156981841 in words is "one hundred fifty-six million, nine hundred eighty-one thousand, eight hundred forty-one".