61744979 has 2 divisors, whose sum is σ = 61744980. Its totient is φ = 61744978.

The previous prime is 61744961. The next prime is 61744999. The reversal of 61744979 is 97944716.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61744979 - 2¹² = 61740883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61744999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30872489 + 30872490.

It is an arithmetic number, because the mean of its divisors is an integer number (30872490).

Almost surely, 2^61744979 is an apocalyptic number.

61744979 is a deficient number, since it is larger than the sum of its proper divisors (1).

61744979 is an equidigital number, since it uses as much as digits as its factorization.

61744979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 47.

The square root of 61744979 is about 7857.7973376768. The cubic root of 61744979 is about 395.2457563759.

The spelling of 61744979 in words is "sixty-one million, seven hundred forty-four thousand, nine hundred seventy-nine".