68351657 has 4 divisors (see below), whose sum is σ = 74565456. Its totient is φ = 62137860.

The previous prime is 68351641. The next prime is 68351663. The reversal of 68351657 is 75615386.

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 68351657 - 2⁴ = 68351641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68351627) 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, 3106883 + ... + 3106904.

It is an arithmetic number, because the mean of its divisors is an integer number (18641364).

Almost surely, 2^68351657 is an apocalyptic number.

It is an amenable number.

68351657 is a deficient number, since it is larger than the sum of its proper divisors (6213799).

68351657 is a wasteful number, since it uses less digits than its factorization.

68351657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6213798.

The product of its digits is 151200, while the sum is 41.

The square root of 68351657 is about 8267.5060931335. The cubic root of 68351657 is about 408.8679001016.

The spelling of 68351657 in words is "sixty-eight million, three hundred fifty-one thousand, six hundred fifty-seven".