61715707 has 4 divisors (see below), whose sum is σ = 63151000. Its totient is φ = 60280416.

The previous prime is 61715681. The next prime is 61715737. The reversal of 61715707 is 70751716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61715707 - 2¹⁵ = 61682939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61715737) 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, 717582 + ... + 717667.

It is an arithmetic number, because the mean of its divisors is an integer number (15787750).

Almost surely, 2^61715707 is an apocalyptic number.

61715707 is a deficient number, since it is larger than the sum of its proper divisors (1435293).

61715707 is a wasteful number, since it uses less digits than its factorization.

61715707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1435292.

The product of its (nonzero) digits is 10290, while the sum is 34.

The square root of 61715707 is about 7855.9345083828. The cubic root of 61715707 is about 395.1832872610.

The spelling of 61715707 in words is "sixty-one million, seven hundred fifteen thousand, seven hundred seven".