68644957 has 8 divisors (see below), whose sum is σ = 70390656. Its totient is φ = 66911232.

The previous prime is 68644951. The next prime is 68644973. The reversal of 68644957 is 75944686.

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 68644957 - 2¹⁹ = 68120669 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68644957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68644951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9238 + ... + 14920.

It is an arithmetic number, because the mean of its divisors is an integer number (8798832).

Almost surely, 2^68644957 is an apocalyptic number.

It is an amenable number.

68644957 is a deficient number, since it is larger than the sum of its proper divisors (1745699).

68644957 is a wasteful number, since it uses less digits than its factorization.

68644957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5987.

The product of its digits is 1451520, while the sum is 49.

The square root of 68644957 is about 8285.2252232513. The cubic root of 68644957 is about 409.4518890366.

The spelling of 68644957 in words is "sixty-eight million, six hundred forty-four thousand, nine hundred fifty-seven".