61974979 has 16 divisors (see below), whose sum is σ = 75358080. Its totient is φ = 50232960.

The previous prime is 61974973. The next prime is 61975003. The reversal of 61974979 is 97947916.

It is not a de Polignac number, because 61974979 - 2⁹ = 61974467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61974973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5169 + ... + 12274.

It is an arithmetic number, because the mean of its divisors is an integer number (4709880).

Almost surely, 2^61974979 is an apocalyptic number.

61974979 is a deficient number, since it is larger than the sum of its proper divisors (13383101).

61974979 is a wasteful number, since it uses less digits than its factorization.

61974979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17490.

The product of its digits is 857304, while the sum is 52.

The square root of 61974979 is about 7872.4188785913. The cubic root of 61974979 is about 395.7359116505.

The spelling of 61974979 in words is "sixty-one million, nine hundred seventy-four thousand, nine hundred seventy-nine".