102617639 has 2 divisors, whose sum is σ = 102617640. Its totient is φ = 102617638.

The previous prime is 102617621. The next prime is 102617681. The reversal of 102617639 is 936716201.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-102617639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 102617599 and 102617608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102617609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51308819 + 51308820.

It is an arithmetic number, because the mean of its divisors is an integer number (51308820).

Almost surely, 2^102617639 is an apocalyptic number.

102617639 is a deficient number, since it is larger than the sum of its proper divisors (1).

102617639 is an equidigital number, since it uses as much as digits as its factorization.

102617639 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 35.

The square root of 102617639 is about 10130.0364757487. The cubic root of 102617639 is about 468.1740516442.

The spelling of 102617639 in words is "one hundred two million, six hundred seventeen thousand, six hundred thirty-nine".