68073657 has 4 divisors (see below), whose sum is σ = 90764880. Its totient is φ = 45382436.

The previous prime is 68073647. The next prime is 68073659. The reversal of 68073657 is 75637086.

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 68073657 - 2⁴ = 68073641 is a prime.

It is not an unprimeable number, because it can be changed into a prime (68073659) 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 3 ways as a sum of consecutive naturals, for example, 11345607 + ... + 11345612.

It is an arithmetic number, because the mean of its divisors is an integer number (22691220).

Almost surely, 2^68073657 is an apocalyptic number.

It is an amenable number.

68073657 is a deficient number, since it is larger than the sum of its proper divisors (22691223).

68073657 is a wasteful number, since it uses less digits than its factorization.

68073657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22691222.

The product of its (nonzero) digits is 211680, while the sum is 42.

The square root of 68073657 is about 8250.6761541100. The cubic root of 68073657 is about 408.3128307721.

The spelling of 68073657 in words is "sixty-eight million, seventy-three thousand, six hundred fifty-seven".