61713775 has 12 divisors (see below), whose sum is σ = 76668952. Its totient is φ = 49278240.

The previous prime is 61713763. The next prime is 61713779. The reversal of 61713775 is 57731716.

It is a happy number.

It is not a de Polignac number, because 61713775 - 2¹³ = 61705583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61713779) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13312 + ... + 17338.

Almost surely, 2^61713775 is an apocalyptic number.

61713775 is a deficient number, since it is larger than the sum of its proper divisors (14955177).

61713775 is a wasteful number, since it uses less digits than its factorization.

61713775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4650 (or 4645 counting only the distinct ones).

The product of its digits is 30870, while the sum is 37.

The square root of 61713775 is about 7855.8115430552. The cubic root of 61713775 is about 395.1791635022.

The spelling of 61713775 in words is "sixty-one million, seven hundred thirteen thousand, seven hundred seventy-five".