172447900691357 has 2 divisors, whose sum is σ = 172447900691358. Its totient is φ = 172447900691356.

The previous prime is 172447900691327. The next prime is 172447900691411. The reversal of 172447900691357 is 753196009744271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 171556058439481 + 891842251876 = 13097941^2 + 944374^2 .

It is a cyclic number.

It is not a de Polignac number, because 172447900691357 - 2⁶ = 172447900691293 is a prime.

It is a super-2 number, since 2×172447900691357² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 172447900691293 and 172447900691302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172447900691327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86223950345678 + 86223950345679.

It is an arithmetic number, because the mean of its divisors is an integer number (86223950345679).

Almost surely, 2^{172447900691357} is an apocalyptic number.

It is an amenable number.

172447900691357 is a deficient number, since it is larger than the sum of its proper divisors (1).

172447900691357 is an equidigital number, since it uses as much as digits as its factorization.

172447900691357 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80015040, while the sum is 65.

The spelling of 172447900691357 in words is "one hundred seventy-two trillion, four hundred forty-seven billion, nine hundred million, six hundred ninety-one thousand, three hundred fifty-seven".