612464681 has 2 divisors, whose sum is σ = 612464682. Its totient is φ = 612464680.

The previous prime is 612464641. The next prime is 612464689. The reversal of 612464681 is 186464216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 610090000 + 2374681 = 24700^2 + 1541^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612464681 is a prime.

It is a super-2 number, since 2×612464681² = 750225970944863522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (612464689) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306232340 + 306232341.

It is an arithmetic number, because the mean of its divisors is an integer number (306232341).

Almost surely, 2^612464681 is an apocalyptic number.

It is an amenable number.

612464681 is a deficient number, since it is larger than the sum of its proper divisors (1).

612464681 is an equidigital number, since it uses as much as digits as its factorization.

612464681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 38.

The square root of 612464681 is about 24748.0237796879. The cubic root of 612464681 is about 849.2333021894.

The spelling of 612464681 in words is "six hundred twelve million, four hundred sixty-four thousand, six hundred eighty-one".