68756257 has 4 divisors (see below), whose sum is σ = 69059376. Its totient is φ = 68453140.

The previous prime is 68756251. The next prime is 68756263. The reversal of 68756257 is 75265786.

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 an interprime number because it is at equal distance from previous prime (68756251) and next prime (68756263).

It is a cyclic number.

It is not a de Polignac number, because 68756257 - 2¹¹ = 68754209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68756251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151219 + ... + 151672.

It is an arithmetic number, because the mean of its divisors is an integer number (17264844).

Almost surely, 2^68756257 is an apocalyptic number.

It is an amenable number.

68756257 is a deficient number, since it is larger than the sum of its proper divisors (303119).

68756257 is a wasteful number, since it uses less digits than its factorization.

68756257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303118.

The product of its digits is 705600, while the sum is 46.

The square root of 68756257 is about 8291.9392786006. The cubic root of 68756257 is about 409.6730627856.

The spelling of 68756257 in words is "sixty-eight million, seven hundred fifty-six thousand, two hundred fifty-seven".