61977892 has 6 divisors (see below), whose sum is σ = 108461318. Its totient is φ = 30988944.

The previous prime is 61977887. The next prime is 61977911. The reversal of 61977892 is 29877916.

It is a happy number.

61977892 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 58614336 + 3363556 = 7656^2 + 1834^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7747233 + ... + 7747240.

Almost surely, 2^61977892 is an apocalyptic number.

It is an amenable number.

61977892 is a deficient number, since it is larger than the sum of its proper divisors (46483426).

61977892 is a wasteful number, since it uses less digits than its factorization.

61977892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15494477 (or 15494475 counting only the distinct ones).

The product of its digits is 381024, while the sum is 49.

The square root of 61977892 is about 7872.6038894384. The cubic root of 61977892 is about 395.7421117905.

The spelling of 61977892 in words is "sixty-one million, nine hundred seventy-seven thousand, eight hundred ninety-two".