68157733 has 4 divisors (see below), whose sum is σ = 77894560. Its totient is φ = 58420908.

The previous prime is 68157721. The next prime is 68157773. The reversal of 68157733 is 33775186.

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 not a de Polignac number, because 68157733 - 2⁵ = 68157701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68157773) 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, 4868403 + ... + 4868416.

It is an arithmetic number, because the mean of its divisors is an integer number (19473640).

Almost surely, 2^68157733 is an apocalyptic number.

It is an amenable number.

68157733 is a deficient number, since it is larger than the sum of its proper divisors (9736827).

68157733 is an equidigital number, since it uses as much as digits as its factorization.

68157733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9736826.

The product of its digits is 105840, while the sum is 40.

The square root of 68157733 is about 8255.7696794424. The cubic root of 68157733 is about 408.4808604608.

The spelling of 68157733 in words is "sixty-eight million, one hundred fifty-seven thousand, seven hundred thirty-three".