106638731 has 2 divisors, whose sum is σ = 106638732. Its totient is φ = 106638730.

The previous prime is 106638647. The next prime is 106638737. The reversal of 106638731 is 137836601.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 106638731 - 2²² = 102444427 is a prime.

It is a super-2 number, since 2×106638731² = 22743637898580722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 106638691 and 106638700.

It is not a weakly prime, because it can be changed into another prime (106638737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53319365 + 53319366.

It is an arithmetic number, because the mean of its divisors is an integer number (53319366).

Almost surely, 2^106638731 is an apocalyptic number.

106638731 is a deficient number, since it is larger than the sum of its proper divisors (1).

106638731 is an equidigital number, since it uses as much as digits as its factorization.

106638731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18144, while the sum is 35.

The square root of 106638731 is about 10326.6030716785. The cubic root of 106638731 is about 474.2110352398.

The spelling of 106638731 in words is "one hundred six million, six hundred thirty-eight thousand, seven hundred thirty-one".