106731931 has 2 divisors, whose sum is σ = 106731932. Its totient is φ = 106731930.

The previous prime is 106731929. The next prime is 106731959. The reversal of 106731931 is 139137601.

It is a weak prime.

It is an emirp because it is prime and its reverse (139137601) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 106731931 - 2¹ = 106731929 is a prime.

It is a super-2 number, since 2×106731931² = 22783410189977522, which contains 22 as substring.

Together with 106731929, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 106731893 and 106731902.

It is not a weakly prime, because it can be changed into another prime (106731901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53365965 + 53365966.

It is an arithmetic number, because the mean of its divisors is an integer number (53365966).

Almost surely, 2^106731931 is an apocalyptic number.

106731931 is a deficient number, since it is larger than the sum of its proper divisors (1).

106731931 is an equidigital number, since it uses as much as digits as its factorization.

106731931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 106731931 is about 10331.1147026833. The cubic root of 106731931 is about 474.3491451576.

The spelling of 106731931 in words is "one hundred six million, seven hundred thirty-one thousand, nine hundred thirty-one".