61079939 has 2 divisors, whose sum is σ = 61079940. Its totient is φ = 61079938.

The previous prime is 61079917. The next prime is 61079969. The reversal of 61079939 is 93997016.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61079939 - 2¹² = 61075843 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61079939.

It is not a weakly prime, because it can be changed into another prime (61079969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30539969 + 30539970.

It is an arithmetic number, because the mean of its divisors is an integer number (30539970).

Almost surely, 2^61079939 is an apocalyptic number.

61079939 is a deficient number, since it is larger than the sum of its proper divisors (1).

61079939 is an equidigital number, since it uses as much as digits as its factorization.

61079939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 61079939 is about 7815.3655704644. The cubic root of 61079939 is about 393.8215993421.

The spelling of 61079939 in words is "sixty-one million, seventy-nine thousand, nine hundred thirty-nine".