68562691 has 4 divisors (see below), whose sum is σ = 68579584. Its totient is φ = 68545800.

The previous prime is 68562673. The next prime is 68562709. The reversal of 68562691 is 19626586.

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

It is an interprime number because it is at equal distance from previous prime (68562673) and next prime (68562709).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68562691 is a prime.

It is a super-2 number, since 2×68562691² = 9401685194322962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68562631) by changing a digit.

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, 1726 + ... + 11836.

It is an arithmetic number, because the mean of its divisors is an integer number (17144896).

Almost surely, 2^68562691 is an apocalyptic number.

68562691 is a deficient number, since it is larger than the sum of its proper divisors (16893).

68562691 is a wasteful number, since it uses less digits than its factorization.

68562691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16892.

The product of its digits is 155520, while the sum is 43.

The square root of 68562691 is about 8280.2591143031. The cubic root of 68562691 is about 409.2882575261.

The spelling of 68562691 in words is "sixty-eight million, five hundred sixty-two thousand, six hundred ninety-one".