68091313 has 4 divisors (see below), whose sum is σ = 68113648. Its totient is φ = 68068980.

The previous prime is 68091301. The next prime is 68091337. The reversal of 68091313 is 31319086.

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, and also an emirpimes, since its reverse is a distinct semiprime: 31319086 = 2 ⋅15659543.

It is a cyclic number.

It is not a de Polignac number, because 68091313 - 2⁵ = 68091281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68091013) 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, 5703 + ... + 12988.

It is an arithmetic number, because the mean of its divisors is an integer number (17028412).

Almost surely, 2^68091313 is an apocalyptic number.

It is an amenable number.

68091313 is a deficient number, since it is larger than the sum of its proper divisors (22335).

68091313 is a wasteful number, since it uses less digits than its factorization.

68091313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22334.

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 68091313 is about 8251.7460576535. The cubic root of 68091313 is about 408.3481285583.

The spelling of 68091313 in words is "sixty-eight million, ninety-one thousand, three hundred thirteen".