67739528231 has 2 divisors, whose sum is σ = 67739528232. Its totient is φ = 67739528230.

The previous prime is 67739528177. The next prime is 67739528243. The reversal of 67739528231 is 13282593776.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67739528231 is a prime.

It is a super-2 number, since 2×67739528231² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67739228231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33869764115 + 33869764116.

It is an arithmetic number, because the mean of its divisors is an integer number (33869764116).

Almost surely, 2^67739528231 is an apocalyptic number.

67739528231 is a deficient number, since it is larger than the sum of its proper divisors (1).

67739528231 is an equidigital number, since it uses as much as digits as its factorization.

67739528231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3810240, while the sum is 53.

The spelling of 67739528231 in words is "sixty-seven billion, seven hundred thirty-nine million, five hundred twenty-eight thousand, two hundred thirty-one".