68490794 has 4 divisors (see below), whose sum is σ = 102736194. Its totient is φ = 34245396.

The previous prime is 68490791. The next prime is 68490823. The reversal of 68490794 is 49709486.

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

It can be written as a sum of positive squares in only one way, i.e., 36421225 + 32069569 = 6035^2 + 5663^2 .

It is not an unprimeable number, because it can be changed into a prime (68490791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17122697 + ... + 17122700.

Almost surely, 2^68490794 is an apocalyptic number.

68490794 is a deficient number, since it is larger than the sum of its proper divisors (34245400).

68490794 is a wasteful number, since it uses less digits than its factorization.

68490794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34245399.

The product of its (nonzero) digits is 435456, while the sum is 47.

The square root of 68490794 is about 8275.9165051371. The cubic root of 68490794 is about 409.1451432983.

The spelling of 68490794 in words is "sixty-eight million, four hundred ninety thousand, seven hundred ninety-four".