108902993 has 2 divisors, whose sum is σ = 108902994. Its totient is φ = 108902992.

The previous prime is 108902987. The next prime is 108903061. The reversal of 108902993 is 399209801.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92313664 + 16589329 = 9608^2 + 4073^2 .

It is a cyclic number.

It is not a de Polignac number, because 108902993 - 2¹² = 108898897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 108902993.

It is not a weakly prime, because it can be changed into another prime (108902903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54451496 + 54451497.

It is an arithmetic number, because the mean of its divisors is an integer number (54451497).

Almost surely, 2^108902993 is an apocalyptic number.

It is an amenable number.

108902993 is a deficient number, since it is larger than the sum of its proper divisors (1).

108902993 is an equidigital number, since it uses as much as digits as its factorization.

108902993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34992, while the sum is 41.

The square root of 108902993 is about 10435.6596820709. The cubic root of 108902993 is about 477.5438670261.

The spelling of 108902993 in words is "one hundred eight million, nine hundred two thousand, nine hundred ninety-three".