68920957 has 8 divisors (see below), whose sum is σ = 79942976. Its totient is φ = 58192992.

The previous prime is 68920937. The next prime is 68920981. The reversal of 68920957 is 75902986.

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-68920957 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 (68920927) 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, 73008 + ... + 73945.

It is an arithmetic number, because the mean of its divisors is an integer number (9992872).

Almost surely, 2^68920957 is an apocalyptic number.

68920957 is a gapful number since it is divisible by the number (67) formed by its first and last digit.

It is an amenable number.

68920957 is a deficient number, since it is larger than the sum of its proper divisors (11022019).

68920957 is a wasteful number, since it uses less digits than its factorization.

68920957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147027.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 68920957 is about 8301.8646700606. The cubic root of 68920957 is about 409.9999147333. Note that the first 4 decimals are identical.

The spelling of 68920957 in words is "sixty-eight million, nine hundred twenty thousand, nine hundred fifty-seven".