61365979 has 2 divisors, whose sum is σ = 61365980. Its totient is φ = 61365978.

The previous prime is 61365977. The next prime is 61366007. The reversal of 61365979 is 97956316.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61365979 - 2¹ = 61365977 is a prime.

Together with 61365977, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61365977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30682989 + 30682990.

It is an arithmetic number, because the mean of its divisors is an integer number (30682990).

Almost surely, 2^61365979 is an apocalyptic number.

61365979 is a deficient number, since it is larger than the sum of its proper divisors (1).

61365979 is an equidigital number, since it uses as much as digits as its factorization.

61365979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 46.

The square root of 61365979 is about 7833.6440434832. The cubic root of 61365979 is about 394.4354033826.

The spelling of 61365979 in words is "sixty-one million, three hundred sixty-five thousand, nine hundred seventy-nine".