102345940639 has 2 divisors, whose sum is σ = 102345940640. Its totient is φ = 102345940638.

The previous prime is 102345940601. The next prime is 102345940663. The reversal of 102345940639 is 936049543201.

It is a strong prime.

It is an emirp because it is prime and its reverse (936049543201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 102345940639 - 2⁷ = 102345940511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102345943639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51172970319 + 51172970320.

It is an arithmetic number, because the mean of its divisors is an integer number (51172970320).

Almost surely, 2^102345940639 is an apocalyptic number.

102345940639 is a deficient number, since it is larger than the sum of its proper divisors (1).

102345940639 is an equidigital number, since it uses as much as digits as its factorization.

102345940639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 46.

The spelling of 102345940639 in words is "one hundred two billion, three hundred forty-five million, nine hundred forty thousand, six hundred thirty-nine".