172804020971 has 2 divisors, whose sum is σ = 172804020972. Its totient is φ = 172804020970.

The previous prime is 172804020943. The next prime is 172804021007. The reversal of 172804020971 is 179020408271.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 172804020971 - 2¹⁴ = 172804004587 is a prime.

It is a super-3 number, since 3×172804020971³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (172804020931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86402010485 + 86402010486.

It is an arithmetic number, because the mean of its divisors is an integer number (86402010486).

Almost surely, 2^172804020971 is an apocalyptic number.

172804020971 is a deficient number, since it is larger than the sum of its proper divisors (1).

172804020971 is an equidigital number, since it uses as much as digits as its factorization.

172804020971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56448, while the sum is 41.

The spelling of 172804020971 in words is "one hundred seventy-two billion, eight hundred four million, twenty thousand, nine hundred seventy-one".