102815969 has 2 divisors, whose sum is σ = 102815970. Its totient is φ = 102815968.

The previous prime is 102815959. The next prime is 102815971. The reversal of 102815969 is 969518201.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53465344 + 49350625 = 7312^2 + 7025^2 .

It is a cyclic number.

It is not a de Polignac number, because 102815969 - 2⁴ = 102815953 is a prime.

It is a super-2 number, since 2×102815969² = 21142246962817922, which contains 22 as substring.

Together with 102815971, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (102815959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51407984 + 51407985.

It is an arithmetic number, because the mean of its divisors is an integer number (51407985).

Almost surely, 2^102815969 is an apocalyptic number.

It is an amenable number.

102815969 is a deficient number, since it is larger than the sum of its proper divisors (1).

102815969 is an equidigital number, since it uses as much as digits as its factorization.

102815969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 41.

The square root of 102815969 is about 10139.8209550268. The cubic root of 102815969 is about 468.4754722235.

The spelling of 102815969 in words is "one hundred two million, eight hundred fifteen thousand, nine hundred sixty-nine".