108005431 has 2 divisors, whose sum is σ = 108005432. Its totient is φ = 108005430.

The previous prime is 108005423. The next prime is 108005453. The reversal of 108005431 is 134500801.

It is an a-pointer prime, because the next prime (108005453) can be obtained adding 108005431 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 108005431 - 2³ = 108005423 is a prime.

It is a super-2 number, since 2×108005431² = 23330346250991522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (108005411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54002715 + 54002716.

It is an arithmetic number, because the mean of its divisors is an integer number (54002716).

Almost surely, 2^108005431 is an apocalyptic number.

108005431 is a deficient number, since it is larger than the sum of its proper divisors (1).

108005431 is an equidigital number, since it uses as much as digits as its factorization.

108005431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 108005431 is about 10392.5661412377. The cubic root of 108005431 is about 476.2282980262.

The spelling of 108005431 in words is "one hundred eight million, five thousand, four hundred thirty-one".