615472313 has 2 divisors, whose sum is σ = 615472314. Its totient is φ = 615472312.

The previous prime is 615472289. The next prime is 615472327. The reversal of 615472313 is 313274516.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335512489 + 279959824 = 18317^2 + 16732^2 .

It is a cyclic number.

It is not a de Polignac number, because 615472313 - 2⁸ = 615472057 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 615472313.

It is not a weakly prime, because it can be changed into another prime (615472343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307736156 + 307736157.

It is an arithmetic number, because the mean of its divisors is an integer number (307736157).

Almost surely, 2^615472313 is an apocalyptic number.

It is an amenable number.

615472313 is a deficient number, since it is larger than the sum of its proper divisors (1).

615472313 is an equidigital number, since it uses as much as digits as its factorization.

615472313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 32.

The square root of 615472313 is about 24808.7144568194. The cubic root of 615472313 is about 850.6211436774.

The spelling of 615472313 in words is "six hundred fifteen million, four hundred seventy-two thousand, three hundred thirteen".