61605307 has 2 divisors, whose sum is σ = 61605308. Its totient is φ = 61605306.

The previous prime is 61605289. The next prime is 61605319. The reversal of 61605307 is 70350616.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61605307 - 2²³ = 53216699 is a prime.

It is not a weakly prime, because it can be changed into another prime (61605337) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30802653 + 30802654.

It is an arithmetic number, because the mean of its divisors is an integer number (30802654).

Almost surely, 2^61605307 is an apocalyptic number.

61605307 is a deficient number, since it is larger than the sum of its proper divisors (1).

61605307 is an equidigital number, since it uses as much as digits as its factorization.

61605307 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 61605307 is about 7848.9048280636. The cubic root of 61605307 is about 394.9475057089.

The spelling of 61605307 in words is "sixty-one million, six hundred five thousand, three hundred seven".