68571139 has 12 divisors (see below), whose sum is σ = 85903104. Its totient is φ = 54253584.

The previous prime is 68571091. The next prime is 68571187. The reversal of 68571139 is 93117586.

It is an interprime number because it is at equal distance from previous prime (68571091) and next prime (68571187).

It is not a de Polignac number, because 68571139 - 2⁹ = 68570627 is a prime.

It is a super-2 number, since 2×68571139² = 9404002207514642, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68571199) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 53187 + ... + 54460.

It is an arithmetic number, because the mean of its divisors is an integer number (7158592).

Almost surely, 2^68571139 is an apocalyptic number.

68571139 is a deficient number, since it is larger than the sum of its proper divisors (17331965).

68571139 is a wasteful number, since it uses less digits than its factorization.

68571139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107674 (or 107667 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The square root of 68571139 is about 8280.7692275537. The cubic root of 68571139 is about 409.3050670822.

It can be divided in two parts, 685 and 71139, that added together give a square (71824 = 268²).

The spelling of 68571139 in words is "sixty-eight million, five hundred seventy-one thousand, one hundred thirty-nine".