61307086 has 4 divisors (see below), whose sum is σ = 91960632. Its totient is φ = 30653542.

The previous prime is 61307069. The next prime is 61307111. The reversal of 61307086 is 68070316.

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

It is a super-2 number, since 2×61307086² = 7517117587622792, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15326770 + ... + 15326773.

It is an arithmetic number, because the mean of its divisors is an integer number (22990158).

Almost surely, 2^61307086 is an apocalyptic number.

61307086 is a deficient number, since it is larger than the sum of its proper divisors (30653546).

61307086 is a wasteful number, since it uses less digits than its factorization.

61307086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30653545.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 61307086 is about 7829.8841626170. The cubic root of 61307086 is about 394.3091829606.

The spelling of 61307086 in words is "sixty-one million, three hundred seven thousand, eighty-six".