102438930817 has 2 divisors, whose sum is σ = 102438930818. Its totient is φ = 102438930816.

The previous prime is 102438930799. The next prime is 102438930907. The reversal of 102438930817 is 718039834201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95051356416 + 7387574401 = 308304^2 + 85951^2 .

It is a cyclic number.

It is not a de Polignac number, because 102438930817 - 2¹⁵ = 102438898049 is a prime.

It is a super-2 number, since 2×102438930817² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (102438931817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51219465408 + 51219465409.

It is an arithmetic number, because the mean of its divisors is an integer number (51219465409).

Almost surely, 2^102438930817 is an apocalyptic number.

It is an amenable number.

102438930817 is a deficient number, since it is larger than the sum of its proper divisors (1).

102438930817 is an equidigital number, since it uses as much as digits as its factorization.

102438930817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 46.

The spelling of 102438930817 in words is "one hundred two billion, four hundred thirty-eight million, nine hundred thirty thousand, eight hundred seventeen".