68993451 has 20 divisors (see below), whose sum is σ = 104610792. Its totient is φ = 45305568.

The previous prime is 68993411. The next prime is 68993453. The reversal of 68993451 is 15439986.

It is a happy number.

It is not a de Polignac number, because 68993451 - 2²¹ = 66896299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68993397 and 68993406.

It is not an unprimeable number, because it can be changed into a prime (68993453) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 930 + ... + 11783.

Almost surely, 2^68993451 is an apocalyptic number.

68993451 is a deficient number, since it is larger than the sum of its proper divisors (35617341).

68993451 is a wasteful number, since it uses less digits than its factorization.

68993451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12792 (or 12783 counting only the distinct ones).

The product of its digits is 233280, while the sum is 45.

The square root of 68993451 is about 8306.2296500879. The cubic root of 68993451 is about 410.1436161562.

The spelling of 68993451 in words is "sixty-eight million, nine hundred ninety-three thousand, four hundred fifty-one".