615690113 has 2 divisors, whose sum is σ = 615690114. Its totient is φ = 615690112.

The previous prime is 615690043. The next prime is 615690133. The reversal of 615690113 is 311096516.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 502118464 + 113571649 = 22408^2 + 10657^2 .

It is a cyclic number.

It is not a de Polignac number, because 615690113 - 2¹⁶ = 615624577 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 615690113.

It is not a weakly prime, because it can be changed into another prime (615690133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 307845056 + 307845057.

It is an arithmetic number, because the mean of its divisors is an integer number (307845057).

Almost surely, 2^615690113 is an apocalyptic number.

It is an amenable number.

615690113 is a deficient number, since it is larger than the sum of its proper divisors (1).

615690113 is an equidigital number, since it uses as much as digits as its factorization.

615690113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 615690113 is about 24813.1036551255. The cubic root of 615690113 is about 850.7214695745.

It can be divided in two parts, 6156 and 90113, that added together give a palindrome (96269).

The spelling of 615690113 in words is "six hundred fifteen million, six hundred ninety thousand, one hundred thirteen".