61312893 has 4 divisors (see below), whose sum is σ = 81750528. Its totient is φ = 40875260.

The previous prime is 61312879. The next prime is 61312903. The reversal of 61312893 is 39821316.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61312893 - 2⁵ = 61312861 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61312093) 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, 10218813 + ... + 10218818.

It is an arithmetic number, because the mean of its divisors is an integer number (20437632).

Almost surely, 2^61312893 is an apocalyptic number.

It is an amenable number.

61312893 is a deficient number, since it is larger than the sum of its proper divisors (20437635).

61312893 is a wasteful number, since it uses less digits than its factorization.

61312893 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20437634.

The product of its digits is 7776, while the sum is 33.

The square root of 61312893 is about 7830.2549766914. The cubic root of 61312893 is about 394.3216322074.

The spelling of 61312893 in words is "sixty-one million, three hundred twelve thousand, eight hundred ninety-three".