712311657651421 has 2 divisors, whose sum is σ = 712311657651422. Its totient is φ = 712311657651420.

The previous prime is 712311657651367. The next prime is 712311657651611. The reversal of 712311657651421 is 124156756113217.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 481269043244025 + 231042614407396 = 21937845^2 + 15200086^2 .

It is a cyclic number.

It is not a de Polignac number, because 712311657651421 - 2¹⁷ = 712311657520349 is a prime.

It is a super-2 number, since 2×712311657651421² (a number of 31 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (712311657651721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356155828825710 + 356155828825711.

It is an arithmetic number, because the mean of its divisors is an integer number (356155828825711).

Almost surely, 2^{712311657651421} is an apocalyptic number.

It is an amenable number.

712311657651421 is a deficient number, since it is larger than the sum of its proper divisors (1).

712311657651421 is an equidigital number, since it uses as much as digits as its factorization.

712311657651421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2116800, while the sum is 52.

The spelling of 712311657651421 in words is "seven hundred twelve trillion, three hundred eleven billion, six hundred fifty-seven million, six hundred fifty-one thousand, four hundred twenty-one".