68749231 has 4 divisors (see below), whose sum is σ = 71738352. Its totient is φ = 65760112.

The previous prime is 68749211. The next prime is 68749237. The reversal of 68749231 is 13294786.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13294786 = 2 ⋅6647393.

It is a cyclic number.

It is not a de Polignac number, because 68749231 - 2⁵ = 68749199 is a prime.

It is a super-2 number, since 2×68749231² = 9452913526182722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68749237) 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, 1494526 + ... + 1494571.

It is an arithmetic number, because the mean of its divisors is an integer number (17934588).

Almost surely, 2^68749231 is an apocalyptic number.

68749231 is a deficient number, since it is larger than the sum of its proper divisors (2989121).

68749231 is a wasteful number, since it uses less digits than its factorization.

68749231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2989120.

The product of its digits is 72576, while the sum is 40.

The square root of 68749231 is about 8291.5156033140. The cubic root of 68749231 is about 409.6591078812.

The spelling of 68749231 in words is "sixty-eight million, seven hundred forty-nine thousand, two hundred thirty-one".