61315689 has 8 divisors (see below), whose sum is σ = 82097280. Its totient is φ = 40705616.

The previous prime is 61315673. The next prime is 61315711. The reversal of 61315689 is 98651316.

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

It is a cyclic number.

It is not a de Polignac number, because 61315689 - 2⁴ = 61315673 is a prime.

It is a super-2 number, since 2×61315689² = 7519227435089442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61315789) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42042 + ... + 43475.

It is an arithmetic number, because the mean of its divisors is an integer number (10262160).

Almost surely, 2^61315689 is an apocalyptic number.

It is an amenable number.

61315689 is a deficient number, since it is larger than the sum of its proper divisors (20781591).

61315689 is a wasteful number, since it uses less digits than its factorization.

61315689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85759.

The product of its digits is 38880, while the sum is 39.

The square root of 61315689 is about 7830.4335129034. The cubic root of 61315689 is about 394.3276260883.

The spelling of 61315689 in words is "sixty-one million, three hundred fifteen thousand, six hundred eighty-nine".