190815206969 has 2 divisors, whose sum is σ = 190815206970. Its totient is φ = 190815206968.

The previous prime is 190815206863. The next prime is 190815207007. The reversal of 190815206969 is 969602518091.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190805596969 + 9610000 = 436813^2 + 3100^2 .

It is a cyclic number.

It is not a de Polignac number, because 190815206969 - 2³² = 186520239673 is a prime.

It is a super-2 number, since 2×190815206969² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (190815206069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 95407603484 + 95407603485.

It is an arithmetic number, because the mean of its divisors is an integer number (95407603485).

Almost surely, 2^190815206969 is an apocalyptic number.

It is an amenable number.

190815206969 is a deficient number, since it is larger than the sum of its proper divisors (1).

190815206969 is an equidigital number, since it uses as much as digits as its factorization.

190815206969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2099520, while the sum is 56.

The spelling of 190815206969 in words is "one hundred ninety billion, eight hundred fifteen million, two hundred six thousand, nine hundred sixty-nine".