612463681 has 2 divisors, whose sum is σ = 612463682. Its totient is φ = 612463680.

The previous prime is 612463669. The next prime is 612463703. The reversal of 612463681 is 186364216.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 409657600 + 202806081 = 20240^2 + 14241^2 .

It is a cyclic number.

It is not a de Polignac number, because 612463681 - 2⁹ = 612463169 is a prime.

It is a super-2 number, since 2×612463681² = 750223521088139522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 612463681.

It is not a weakly prime, because it can be changed into another prime (612463381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306231840 + 306231841.

It is an arithmetic number, because the mean of its divisors is an integer number (306231841).

Almost surely, 2^612463681 is an apocalyptic number.

It is an amenable number.

612463681 is a deficient number, since it is larger than the sum of its proper divisors (1).

612463681 is an equidigital number, since it uses as much as digits as its factorization.

612463681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

The square root of 612463681 is about 24748.0035760463. The cubic root of 612463681 is about 849.2328399947.

The spelling of 612463681 in words is "six hundred twelve million, four hundred sixty-three thousand, six hundred eighty-one".