612640417 has 2 divisors, whose sum is σ = 612640418. Its totient is φ = 612640416.

The previous prime is 612640361. The next prime is 612640423. The reversal of 612640417 is 714046216.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 354041856 + 258598561 = 18816^2 + 16081^2 .

It is a cyclic number.

It is not a de Polignac number, because 612640417 - 2¹⁹ = 612116129 is a prime.

It is not a weakly prime, because it can be changed into another prime (612640477) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 306320208 + 306320209.

It is an arithmetic number, because the mean of its divisors is an integer number (306320209).

Almost surely, 2^612640417 is an apocalyptic number.

It is an amenable number.

612640417 is a deficient number, since it is larger than the sum of its proper divisors (1).

612640417 is an equidigital number, since it uses as much as digits as its factorization.

612640417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 612640417 is about 24751.5740307561. The cubic root of 612640417 is about 849.3145186233.

The spelling of 612640417 in words is "six hundred twelve million, six hundred forty thousand, four hundred seventeen".