68720351 has 8 divisors (see below), whose sum is σ = 78742560. Its totient is φ = 58749408.

The previous prime is 68720347. The next prime is 68720357. The reversal of 68720351 is 15302786.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 68720351 - 2² = 68720347 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68720357) 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, 9896 + ... + 15341.

It is an arithmetic number, because the mean of its divisors is an integer number (9842820).

Almost surely, 2^68720351 is an apocalyptic number.

68720351 is a deficient number, since it is larger than the sum of its proper divisors (10022209).

68720351 is a wasteful number, since it uses less digits than its factorization.

68720351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25633.

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 68720351 is about 8289.7738811140. The cubic root of 68720351 is about 409.6017369991.

The spelling of 68720351 in words is "sixty-eight million, seven hundred twenty thousand, three hundred fifty-one".