61895677 has 2 divisors, whose sum is σ = 61895678. Its totient is φ = 61895676.

The previous prime is 61895671. The next prime is 61895681. The reversal of 61895677 is 77659816.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32421636 + 29474041 = 5694^2 + 5429^2 .

It is a cyclic number.

It is not a de Polignac number, because 61895677 - 2¹⁹ = 61371389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 61895677.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61895671) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30947838 + 30947839.

It is an arithmetic number, because the mean of its divisors is an integer number (30947839).

Almost surely, 2^61895677 is an apocalyptic number.

It is an amenable number.

61895677 is a deficient number, since it is larger than the sum of its proper divisors (1).

61895677 is an equidigital number, since it uses as much as digits as its factorization.

61895677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 635040, while the sum is 49.

The square root of 61895677 is about 7867.3805678892. The cubic root of 61895677 is about 395.5670475656.

The spelling of 61895677 in words is "sixty-one million, eight hundred ninety-five thousand, six hundred seventy-seven".