31723866832457 has 2 divisors, whose sum is σ = 31723866832458. Its totient is φ = 31723866832456.

The previous prime is 31723866832423. The next prime is 31723866832481. The reversal of 31723866832457 is 75423866832713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26082429553216 + 5641437279241 = 5107096^2 + 2375171^2 .

It is a cyclic number.

It is not a de Polignac number, because 31723866832457 - 2⁸ = 31723866832201 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31723866832393 and 31723866832402.

It is not a weakly prime, because it can be changed into another prime (31723866432457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15861933416228 + 15861933416229.

It is an arithmetic number, because the mean of its divisors is an integer number (15861933416229).

Almost surely, 2^{31723866832457} is an apocalyptic number.

It is an amenable number.

31723866832457 is a deficient number, since it is larger than the sum of its proper divisors (1).

31723866832457 is an equidigital number, since it uses as much as digits as its factorization.

31723866832457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 243855360, while the sum is 65.

The spelling of 31723866832457 in words is "thirty-one trillion, seven hundred twenty-three billion, eight hundred sixty-six million, eight hundred thirty-two thousand, four hundred fifty-seven".