102444631139 has 2 divisors, whose sum is σ = 102444631140. Its totient is φ = 102444631138.

The previous prime is 102444631111. The next prime is 102444631147. The reversal of 102444631139 is 931136444201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102444631139 is a prime.

It is not a weakly prime, because it can be changed into another prime (102444631189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51222315569 + 51222315570.

It is an arithmetic number, because the mean of its divisors is an integer number (51222315570).

Almost surely, 2^102444631139 is an apocalyptic number.

102444631139 is a deficient number, since it is larger than the sum of its proper divisors (1).

102444631139 is an equidigital number, since it uses as much as digits as its factorization.

102444631139 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 38.

The spelling of 102444631139 in words is "one hundred two billion, four hundred forty-four million, six hundred thirty-one thousand, one hundred thirty-nine".