61968479 has 2 divisors, whose sum is σ = 61968480. Its totient is φ = 61968478.

The previous prime is 61968457. The next prime is 61968493. The reversal of 61968479 is 97486916.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61968479 - 2⁸ = 61968223 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61968499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30984239 + 30984240.

It is an arithmetic number, because the mean of its divisors is an integer number (30984240).

Almost surely, 2^61968479 is an apocalyptic number.

61968479 is a deficient number, since it is larger than the sum of its proper divisors (1).

61968479 is an equidigital number, since it uses as much as digits as its factorization.

61968479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 50.

The square root of 61968479 is about 7872.0060340424. The cubic root of 61968479 is about 395.7220761026.

The spelling of 61968479 in words is "sixty-one million, nine hundred sixty-eight thousand, four hundred seventy-nine".