981249131 has 2 divisors, whose sum is σ = 981249132. Its totient is φ = 981249130.

The previous prime is 981249083. The next prime is 981249149. The reversal of 981249131 is 131942189.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 981249131 - 2⁶ = 981249067 is a prime.

It is a super-2 number, since 2×981249131² = 1925699714176510322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (981249151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490624565 + 490624566.

It is an arithmetic number, because the mean of its divisors is an integer number (490624566).

Almost surely, 2^981249131 is an apocalyptic number.

981249131 is a deficient number, since it is larger than the sum of its proper divisors (1).

981249131 is an equidigital number, since it uses as much as digits as its factorization.

981249131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 38.

The square root of 981249131 is about 31324.8963446010. The cubic root of 981249131 is about 993.7102320966.

The spelling of 981249131 in words is "nine hundred eighty-one million, two hundred forty-nine thousand, one hundred thirty-one".