61463881 has 2 divisors, whose sum is σ = 61463882. Its totient is φ = 61463880.

The previous prime is 61463873. The next prime is 61463887. The reversal of 61463881 is 18836416.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53290000 + 8173881 = 7300^2 + 2859^2 .

It is a cyclic number.

It is not a de Polignac number, because 61463881 - 2³ = 61463873 is a prime.

It is a super-2 number, since 2×61463881² = 7555617335164322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61463881.

It is not a weakly prime, because it can be changed into another prime (61463887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30731940 + 30731941.

It is an arithmetic number, because the mean of its divisors is an integer number (30731941).

Almost surely, 2^61463881 is an apocalyptic number.

It is an amenable number.

61463881 is a deficient number, since it is larger than the sum of its proper divisors (1).

61463881 is an equidigital number, since it uses as much as digits as its factorization.

61463881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27648, while the sum is 37.

The square root of 61463881 is about 7839.8903691314. The cubic root of 61463881 is about 394.6450499324.

The spelling of 61463881 in words is "sixty-one million, four hundred sixty-three thousand, eight hundred eighty-one".