61879739 has 2 divisors, whose sum is σ = 61879740. Its totient is φ = 61879738.

The previous prime is 61879703. The next prime is 61879859. The reversal of 61879739 is 93797816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61879739 - 2⁸ = 61879483 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (61879339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30939869 + 30939870.

It is an arithmetic number, because the mean of its divisors is an integer number (30939870).

Almost surely, 2^61879739 is an apocalyptic number.

61879739 is a deficient number, since it is larger than the sum of its proper divisors (1).

61879739 is an equidigital number, since it uses as much as digits as its factorization.

61879739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 571536, while the sum is 50.

The square root of 61879739 is about 7866.3675861226. The cubic root of 61879739 is about 395.5330921042.

The spelling of 61879739 in words is "sixty-one million, eight hundred seventy-nine thousand, seven hundred thirty-nine".