61286813 has 8 divisors (see below), whose sum is σ = 70554432. Its totient is φ = 52147296.

The previous prime is 61286809. The next prime is 61286821. The reversal of 61286813 is 31868216.

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 61286813 - 2² = 61286809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61286803) 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, 30995 + ... + 32912.

It is an arithmetic number, because the mean of its divisors is an integer number (8819304).

Almost surely, 2^61286813 is an apocalyptic number.

It is an amenable number.

61286813 is a deficient number, since it is larger than the sum of its proper divisors (9267619).

61286813 is a wasteful number, since it uses less digits than its factorization.

61286813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64051.

The product of its digits is 13824, while the sum is 35.

The square root of 61286813 is about 7828.5894642649. The cubic root of 61286813 is about 394.2657148403.

The spelling of 61286813 in words is "sixty-one million, two hundred eighty-six thousand, eight hundred thirteen".