172902244969 has 2 divisors, whose sum is σ = 172902244970. Its totient is φ = 172902244968.

The previous prime is 172902244967. The next prime is 172902244979. The reversal of 172902244969 is 969442209271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 103483169344 + 69419075625 = 321688^2 + 263475^2 .

It is a cyclic number.

It is not a de Polignac number, because 172902244969 - 2¹ = 172902244967 is a prime.

It is a super-2 number, since 2×172902244969² (a number of 23 digits) contains 22 as substring.

Together with 172902244967, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (172902244967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86451122484 + 86451122485.

It is an arithmetic number, because the mean of its divisors is an integer number (86451122485).

Almost surely, 2^172902244969 is an apocalyptic number.

It is an amenable number.

172902244969 is a deficient number, since it is larger than the sum of its proper divisors (1).

172902244969 is an equidigital number, since it uses as much as digits as its factorization.

172902244969 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 172902244969 in words is "one hundred seventy-two billion, nine hundred two million, two hundred forty-four thousand, nine hundred sixty-nine".