61957977 has 4 divisors (see below), whose sum is σ = 82610640. Its totient is φ = 41305316.

The previous prime is 61957927. The next prime is 61957981. The reversal of 61957977 is 77975916.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61957977 - 2⁷ = 61957849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61957927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10326327 + ... + 10326332.

It is an arithmetic number, because the mean of its divisors is an integer number (20652660).

Almost surely, 2^61957977 is an apocalyptic number.

It is an amenable number.

61957977 is a deficient number, since it is larger than the sum of its proper divisors (20652663).

61957977 is a wasteful number, since it uses less digits than its factorization.

61957977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20652662.

The product of its digits is 833490, while the sum is 51.

The square root of 61957977 is about 7871.3389585254. The cubic root of 61957977 is about 395.6997200699.

The spelling of 61957977 in words is "sixty-one million, nine hundred fifty-seven thousand, nine hundred seventy-seven".