102361639 has 2 divisors, whose sum is σ = 102361640. Its totient is φ = 102361638.

The previous prime is 102361631. The next prime is 102361663. The reversal of 102361639 is 936163201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 102361639 - 2³ = 102361631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 102361639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (102361631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51180819 + 51180820.

It is an arithmetic number, because the mean of its divisors is an integer number (51180820).

Almost surely, 2^102361639 is an apocalyptic number.

102361639 is a deficient number, since it is larger than the sum of its proper divisors (1).

102361639 is an equidigital number, since it uses as much as digits as its factorization.

102361639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 102361639 is about 10117.3928954054. The cubic root of 102361639 is about 467.7844098567.

The spelling of 102361639 in words is "one hundred two million, three hundred sixty-one thousand, six hundred thirty-nine".