981139007 has 2 divisors, whose sum is σ = 981139008. Its totient is φ = 981139006.

The previous prime is 981138973. The next prime is 981139013. The reversal of 981139007 is 700931189.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 981139007 - 2⁶ = 981138943 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (981139807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 490569503 + 490569504.

It is an arithmetic number, because the mean of its divisors is an integer number (490569504).

Almost surely, 2^981139007 is an apocalyptic number.

981139007 is a deficient number, since it is larger than the sum of its proper divisors (1).

981139007 is an equidigital number, since it uses as much as digits as its factorization.

981139007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 981139007 is about 31323.1385241007. The cubic root of 981139007 is about 993.6730565428.

The spelling of 981139007 in words is "nine hundred eighty-one million, one hundred thirty-nine thousand, seven".