615470491 has 2 divisors, whose sum is σ = 615470492. Its totient is φ = 615470490.

The previous prime is 615470489. The next prime is 615470521. The reversal of 615470491 is 194074516.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 615470491 - 2¹ = 615470489 is a prime.

Together with 615470489, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 615470491.

It is not a weakly prime, because it can be changed into another prime (615470441) 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, 307735245 + 307735246.

It is an arithmetic number, because the mean of its divisors is an integer number (307735246).

Almost surely, 2^615470491 is an apocalyptic number.

615470491 is a deficient number, since it is larger than the sum of its proper divisors (1).

615470491 is an equidigital number, since it uses as much as digits as its factorization.

615470491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30240, while the sum is 37.

The square root of 615470491 is about 24808.6777358246. The cubic root of 615470491 is about 850.6203043040.

The spelling of 615470491 in words is "six hundred fifteen million, four hundred seventy thousand, four hundred ninety-one".