612731311 has 2 divisors, whose sum is σ = 612731312. Its totient is φ = 612731310.

The previous prime is 612731299. The next prime is 612731341. The reversal of 612731311 is 113137216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 612731311 - 2⁹ = 612730799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612731341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306365655 + 306365656.

It is an arithmetic number, because the mean of its divisors is an integer number (306365656).

Almost surely, 2^612731311 is an apocalyptic number.

612731311 is a deficient number, since it is larger than the sum of its proper divisors (1).

612731311 is an equidigital number, since it uses as much as digits as its factorization.

612731311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 25.

The square root of 612731311 is about 24753.4100883090. The cubic root of 612731311 is about 849.3565192130.

Adding to 612731311 its reverse (113137216), we get a palindrome (725868527).

It can be divided in two parts, 61 and 2731311, that added together give a palindrome (2731372).

The spelling of 612731311 in words is "six hundred twelve million, seven hundred thirty-one thousand, three hundred eleven".