68621357 has 4 divisors (see below), whose sum is σ = 78424416. Its totient is φ = 58818300.

The previous prime is 68621327. The next prime is 68621393. The reversal of 68621357 is 75312686.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 68621357 - 2²⁶ = 1512493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68621357.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68621317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4901519 + ... + 4901532.

It is an arithmetic number, because the mean of its divisors is an integer number (19606104).

Almost surely, 2^68621357 is an apocalyptic number.

It is an amenable number.

68621357 is a deficient number, since it is larger than the sum of its proper divisors (9803059).

68621357 is an equidigital number, since it uses as much as digits as its factorization.

68621357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9803058.

The product of its digits is 60480, while the sum is 38.

The square root of 68621357 is about 8283.8008788237. The cubic root of 68621357 is about 409.4049607426.

The spelling of 68621357 in words is "sixty-eight million, six hundred twenty-one thousand, three hundred fifty-seven".