172400762893 has 2 divisors, whose sum is σ = 172400762894. Its totient is φ = 172400762892.

The previous prime is 172400762869. The next prime is 172400762903. The reversal of 172400762893 is 398267004271.

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., 155663389764 + 16737373129 = 394542^2 + 129373^2 .

It is a cyclic number.

It is not a de Polignac number, because 172400762893 - 2²¹ = 172398665741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172400762293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86200381446 + 86200381447.

It is an arithmetic number, because the mean of its divisors is an integer number (86200381447).

Almost surely, 2^172400762893 is an apocalyptic number.

It is an amenable number.

172400762893 is a deficient number, since it is larger than the sum of its proper divisors (1).

172400762893 is an equidigital number, since it uses as much as digits as its factorization.

172400762893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 49.

The spelling of 172400762893 in words is "one hundred seventy-two billion, four hundred million, seven hundred sixty-two thousand, eight hundred ninety-three".