61968457 has 2 divisors, whose sum is σ = 61968458. Its totient is φ = 61968456.

The previous prime is 61968421. The next prime is 61968479. The reversal of 61968457 is 75486916.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49266361 + 12702096 = 7019^2 + 3564^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61968457 is a prime.

It is not a weakly prime, because it can be changed into another prime (61968407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30984228 + 30984229.

It is an arithmetic number, because the mean of its divisors is an integer number (30984229).

Almost surely, 2^61968457 is an apocalyptic number.

It is an amenable number.

61968457 is a deficient number, since it is larger than the sum of its proper divisors (1).

61968457 is an equidigital number, since it uses as much as digits as its factorization.

61968457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The square root of 61968457 is about 7872.0046366856. The cubic root of 61968457 is about 395.7220292730.

The spelling of 61968457 in words is "sixty-one million, nine hundred sixty-eight thousand, four hundred fifty-seven".