981140157 has 12 divisors (see below), whose sum is σ = 1418364220. Its totient is φ = 653557248.

The previous prime is 981140143. The next prime is 981140177. The reversal of 981140157 is 751041189.

It can be written as a sum of positive squares in 2 ways, for example, as 479872836 + 501267321 = 21906^2 + 22389^2 .

It is not a de Polignac number, because 981140157 - 2⁷ = 981140029 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 (981140177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32932 + ... + 55197.

Almost surely, 2^981140157 is an apocalyptic number.

It is an amenable number.

981140157 is a deficient number, since it is larger than the sum of its proper divisors (437224063).

981140157 is a wasteful number, since it uses less digits than its factorization.

981140157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89372 (or 89369 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 981140157 is about 31323.1568811319. The cubic root of 981140157 is about 993.6734447731.

The spelling of 981140157 in words is "nine hundred eighty-one million, one hundred forty thousand, one hundred fifty-seven".