68813951 has 4 divisors (see below), whose sum is σ = 68873112. Its totient is φ = 68754792.

The previous prime is 68813939. The next prime is 68813959. The reversal of 68813951 is 15931886.

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

It is a cyclic number.

It is not a de Polignac number, because 68813951 - 2⁶ = 68813887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68813899 and 68813908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68813959) 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, 27800 + ... + 30173.

It is an arithmetic number, because the mean of its divisors is an integer number (17218278).

Almost surely, 2^68813951 is an apocalyptic number.

68813951 is a deficient number, since it is larger than the sum of its proper divisors (59161).

68813951 is a wasteful number, since it uses less digits than its factorization.

68813951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59160.

The product of its digits is 51840, while the sum is 41.

The square root of 68813951 is about 8295.4174699047. The cubic root of 68813951 is about 409.7876175467.

The spelling of 68813951 in words is "sixty-eight million, eight hundred thirteen thousand, nine hundred fifty-one".