61031686 has 8 divisors (see below), whose sum is σ = 96365880. Its totient is φ = 28909728.

The previous prime is 61031669. The next prime is 61031699. The reversal of 61031686 is 68613016.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 803011 + ... + 803086.

It is an arithmetic number, because the mean of its divisors is an integer number (12045735).

Almost surely, 2^61031686 is an apocalyptic number.

61031686 is a deficient number, since it is larger than the sum of its proper divisors (35334194).

61031686 is a wasteful number, since it uses less digits than its factorization.

61031686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1606118.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 61031686 is about 7812.2779008430. The cubic root of 61031686 is about 393.7178659927.

The spelling of 61031686 in words is "sixty-one million, thirty-one thousand, six hundred eighty-six".