612745631 has 2 divisors, whose sum is σ = 612745632. Its totient is φ = 612745630.

The previous prime is 612745613. The next prime is 612745699. The reversal of 612745631 is 136547216.

Together with previous prime (612745613) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-612745631 is a prime.

It is a super-2 number, since 2×612745631² = 750914416619176322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 612745591 and 612745600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (612745531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306372815 + 306372816.

It is an arithmetic number, because the mean of its divisors is an integer number (306372816).

Almost surely, 2^612745631 is an apocalyptic number.

612745631 is a deficient number, since it is larger than the sum of its proper divisors (1).

612745631 is an equidigital number, since it uses as much as digits as its factorization.

612745631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 35.

The square root of 612745631 is about 24753.6993396947. The cubic root of 612745631 is about 849.3631358656.

The spelling of 612745631 in words is "six hundred twelve million, seven hundred forty-five thousand, six hundred thirty-one".