981136427 has 2 divisors, whose sum is σ = 981136428. Its totient is φ = 981136426.

The previous prime is 981136361. The next prime is 981136441. The reversal of 981136427 is 724631189.

It is a strong prime.

It is an emirp because it is prime and its reverse (724631189) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 981136427 - 2⁸ = 981136171 is a prime.

It is not a weakly prime, because it can be changed into another prime (981136127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490568213 + 490568214.

It is an arithmetic number, because the mean of its divisors is an integer number (490568214).

Almost surely, 2^981136427 is an apocalyptic number.

981136427 is a deficient number, since it is larger than the sum of its proper divisors (1).

981136427 is an equidigital number, since it uses as much as digits as its factorization.

981136427 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 981136427 is about 31323.0973404611. The cubic root of 981136427 is about 993.6721855555.

The spelling of 981136427 in words is "nine hundred eighty-one million, one hundred thirty-six thousand, four hundred twenty-seven".