61712305 has 4 divisors (see below), whose sum is σ = 74054772. Its totient is φ = 49369840.

The previous prime is 61712281. The next prime is 61712309. The reversal of 61712305 is 50321716.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10575504 + 51136801 = 3252^2 + 7151^2 .

It is not a de Polignac number, because 61712305 - 2⁷ = 61712177 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61712305.

It is not an unprimeable number, because it can be changed into a prime (61712309) 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, 6171226 + ... + 6171235.

It is an arithmetic number, because the mean of its divisors is an integer number (18513693).

Almost surely, 2^61712305 is an apocalyptic number.

It is an amenable number.

61712305 is a deficient number, since it is larger than the sum of its proper divisors (12342467).

61712305 is a wasteful number, since it uses less digits than its factorization.

61712305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12342466.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 61712305 is about 7855.7179811905. The cubic root of 61712305 is about 395.1760258019.

The spelling of 61712305 in words is "sixty-one million, seven hundred twelve thousand, three hundred five".