68402489 has 8 divisors (see below), whose sum is σ = 73362240. Its totient is φ = 63578736.

The previous prime is 68402479. The next prime is 68402507. The reversal of 68402489 is 98420486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68402489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68402419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32957 + ... + 34970.

It is an arithmetic number, because the mean of its divisors is an integer number (9170280).

Almost surely, 2^68402489 is an apocalyptic number.

It is an amenable number.

68402489 is a deficient number, since it is larger than the sum of its proper divisors (4959751).

68402489 is a wasteful number, since it uses less digits than its factorization.

68402489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67999.

The product of its (nonzero) digits is 110592, while the sum is 41.

The square root of 68402489 is about 8270.5797257508. The cubic root of 68402489 is about 408.9692310910.

The spelling of 68402489 in words is "sixty-eight million, four hundred two thousand, four hundred eighty-nine".