61881713 has 2 divisors, whose sum is σ = 61881714. Its totient is φ = 61881712.

The previous prime is 61881709. The next prime is 61881739. The reversal of 61881713 is 31718816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42941809 + 18939904 = 6553^2 + 4352^2 .

It is a cyclic number.

It is not a de Polignac number, because 61881713 - 2² = 61881709 is a prime.

It is not a weakly prime, because it can be changed into another prime (61811713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30940856 + 30940857.

It is an arithmetic number, because the mean of its divisors is an integer number (30940857).

Almost surely, 2^61881713 is an apocalyptic number.

It is an amenable number.

61881713 is a deficient number, since it is larger than the sum of its proper divisors (1).

61881713 is an equidigital number, since it uses as much as digits as its factorization.

61881713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8064, while the sum is 35.

The square root of 61881713 is about 7866.4930559939. The cubic root of 61881713 is about 395.5372979721.

The spelling of 61881713 in words is "sixty-one million, eight hundred eighty-one thousand, seven hundred thirteen".