68748931 has 4 divisors (see below), whose sum is σ = 69273864. Its totient is φ = 68224000.

The previous prime is 68748919. The next prime is 68748943. The reversal of 68748931 is 13984786.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (68748919) and next prime (68748943).

It is a cyclic number.

It is not a de Polignac number, because 68748931 - 2⁵ = 68748899 is a prime.

It is a super-2 number, since 2×68748931² = 9452831027285522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68748961) 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, 262270 + ... + 262531.

It is an arithmetic number, because the mean of its divisors is an integer number (17318466).

Almost surely, 2^68748931 is an apocalyptic number.

68748931 is a deficient number, since it is larger than the sum of its proper divisors (524933).

68748931 is a wasteful number, since it uses less digits than its factorization.

68748931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524932.

The product of its digits is 290304, while the sum is 46.

The square root of 68748931 is about 8291.4975125124. The cubic root of 68748931 is about 409.6585120058.

The spelling of 68748931 in words is "sixty-eight million, seven hundred forty-eight thousand, nine hundred thirty-one".