107890991 has 16 divisors (see below), whose sum is σ = 122774400. Its totient is φ = 94096128.

The previous prime is 107890973. The next prime is 107891029. The reversal of 107890991 is 199098701.

It is a cyclic number.

It is not a de Polignac number, because 107890991 - 2¹⁸ = 107628847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107890921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14675 + ... + 20763.

It is an arithmetic number, because the mean of its divisors is an integer number (7673400).

Almost surely, 2^107890991 is an apocalyptic number.

107890991 is a deficient number, since it is larger than the sum of its proper divisors (14883409).

107890991 is a wasteful number, since it uses less digits than its factorization.

107890991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6178.

The product of its (nonzero) digits is 40824, while the sum is 44.

The square root of 107890991 is about 10387.0588233628. The cubic root of 107890991 is about 476.0600385042.

The spelling of 107890991 in words is "one hundred seven million, eight hundred ninety thousand, nine hundred ninety-one".