61938777 has 8 divisors (see below), whose sum is σ = 84817216. Its totient is φ = 40176432.

The previous prime is 61938761. The next prime is 61938781. The reversal of 61938777 is 77783916.

It is a happy number.

61938777 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61938777 - 2⁴ = 61938761 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61938707) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 278893 + ... + 279114.

It is an arithmetic number, because the mean of its divisors is an integer number (10602152).

Almost surely, 2^61938777 is an apocalyptic number.

It is an amenable number.

61938777 is a deficient number, since it is larger than the sum of its proper divisors (22878439).

61938777 is a wasteful number, since it uses less digits than its factorization.

61938777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558047.

The product of its digits is 444528, while the sum is 48.

The square root of 61938777 is about 7870.1192494142. The cubic root of 61938777 is about 395.6588417203.

The spelling of 61938777 in words is "sixty-one million, nine hundred thirty-eight thousand, seven hundred seventy-seven".