108239431 has 2 divisors, whose sum is σ = 108239432. Its totient is φ = 108239430.

The previous prime is 108239419. The next prime is 108239479. The reversal of 108239431 is 134932801.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 108239431 - 2⁵ = 108239399 is a prime.

It is a super-2 number, since 2×108239431² = 23431548846407522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 108239393 and 108239402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108239531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54119715 + 54119716.

It is an arithmetic number, because the mean of its divisors is an integer number (54119716).

Almost surely, 2^108239431 is an apocalyptic number.

108239431 is a deficient number, since it is larger than the sum of its proper divisors (1).

108239431 is an equidigital number, since it uses as much as digits as its factorization.

108239431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 108239431 is about 10403.8180972180. The cubic root of 108239431 is about 476.5719753114.

The spelling of 108239431 in words is "one hundred eight million, two hundred thirty-nine thousand, four hundred thirty-one".