61943979 has 32 divisors (see below), whose sum is σ = 87736320. Its totient is φ = 38836512.

The previous prime is 61943969. The next prime is 61943993. The reversal of 61943979 is 97934916.

61943979 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61943979 - 2⁷ = 61943851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61943969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 746272 + ... + 746354.

It is an arithmetic number, because the mean of its divisors is an integer number (2741760).

Almost surely, 2^61943979 is an apocalyptic number.

61943979 is a deficient number, since it is larger than the sum of its proper divisors (25792341).

61943979 is a wasteful number, since it uses less digits than its factorization.

61943979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279.

The product of its digits is 367416, while the sum is 48.

The square root of 61943979 is about 7870.4497330203. The cubic root of 61943979 is about 395.6699180324.

The spelling of 61943979 in words is "sixty-one million, nine hundred forty-three thousand, nine hundred seventy-nine".