61979693 has 2 divisors, whose sum is σ = 61979694. Its totient is φ = 61979692.

The previous prime is 61979651. The next prime is 61979713. The reversal of 61979693 is 39697916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44649124 + 17330569 = 6682^2 + 4163^2 .

It is a cyclic number.

It is not a de Polignac number, because 61979693 - 2⁶ = 61979629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61979893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30989846 + 30989847.

It is an arithmetic number, because the mean of its divisors is an integer number (30989847).

Almost surely, 2^61979693 is an apocalyptic number.

It is an amenable number.

61979693 is a deficient number, since it is larger than the sum of its proper divisors (1).

61979693 is an equidigital number, since it uses as much as digits as its factorization.

61979693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 551124, while the sum is 50.

The square root of 61979693 is about 7872.7182726172. The cubic root of 61979693 is about 395.7459450103.

The spelling of 61979693 in words is "sixty-one million, nine hundred seventy-nine thousand, six hundred ninety-three".