615313 has 2 divisors, whose sum is σ = 615314. Its totient is φ = 615312.

The previous prime is 615299. The next prime is 615337. The reversal of 615313 is 313516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 494209 + 121104 = 703^2 + 348^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-615313 is a prime.

It is a super-2 number, since 2×615313² = 757220175938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (615343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307656 + 307657.

It is an arithmetic number, because the mean of its divisors is an integer number (307657).

2⁶¹⁵³¹³ is an apocalyptic number.

It is an amenable number.

615313 is a deficient number, since it is larger than the sum of its proper divisors (1).

615313 is an equidigital number, since it uses as much as digits as its factorization.

615313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 19.

The square root of 615313 is about 784.4188931942. The cubic root of 615313 is about 85.0547743841.

Adding to 615313 its reverse (313516), we get a palindrome (928829).

The spelling of 615313 in words is "six hundred fifteen thousand, three hundred thirteen".