157000981 has 2 divisors, whose sum is σ = 157000982. Its totient is φ = 157000980.

The previous prime is 157000973. The next prime is 157001021. The reversal of 157000981 is 189000751.

157000981 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., 157000900 + 81 = 12530^2 + 9^2 .

It is a cyclic number.

It is not a de Polignac number, because 157000981 - 2³ = 157000973 is a prime.

It is a super-2 number, since 2×157000981² = 49298616069924722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (157000381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78500490 + 78500491.

It is an arithmetic number, because the mean of its divisors is an integer number (78500491).

Almost surely, 2^157000981 is an apocalyptic number.

It is an amenable number.

157000981 is a deficient number, since it is larger than the sum of its proper divisors (1).

157000981 is an equidigital number, since it uses as much as digits as its factorization.

157000981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 31.

The square root of 157000981 is about 12530.0032322422. The cubic root of 157000981 is about 539.4701948162.

It can be divided in two parts, 1570009 and 81, that multiplied together give a square (127170729 = 11277²).

The spelling of 157000981 in words is "one hundred fifty-seven million, nine hundred eighty-one", and thus it is an aban number.