102101939 has 2 divisors, whose sum is σ = 102101940. Its totient is φ = 102101938.

The previous prime is 102101921. The next prime is 102101947. The reversal of 102101939 is 939101201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 102101939 - 2¹² = 102097843 is a prime.

It is not a weakly prime, because it can be changed into another prime (102101239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51050969 + 51050970.

It is an arithmetic number, because the mean of its divisors is an integer number (51050970).

Almost surely, 2^102101939 is an apocalyptic number.

102101939 is a deficient number, since it is larger than the sum of its proper divisors (1).

102101939 is an equidigital number, since it uses as much as digits as its factorization.

102101939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 102101939 is about 10104.5504105824. The cubic root of 102101939 is about 467.3884721614.

The spelling of 102101939 in words is "one hundred two million, one hundred one thousand, nine hundred thirty-nine".