107285991 has 4 divisors (see below), whose sum is σ = 143047992. Its totient is φ = 71523992.

The previous prime is 107285957. The next prime is 107285999. The reversal of 107285991 is 199582701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199582701 = 3 ⋅66527567.

It is a cyclic number.

It is not a de Polignac number, because 107285991 - 2⁷ = 107285863 is a prime.

It is a super-3 number, since 3×107285991³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (107285999) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17880996 + ... + 17881001.

It is an arithmetic number, because the mean of its divisors is an integer number (35761998).

Almost surely, 2^107285991 is an apocalyptic number.

107285991 is a deficient number, since it is larger than the sum of its proper divisors (35762001).

107285991 is an equidigital number, since it uses as much as digits as its factorization.

107285991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35762000.

The product of its (nonzero) digits is 45360, while the sum is 42.

The square root of 107285991 is about 10357.8951047015. The cubic root of 107285991 is about 475.1685326251.

The spelling of 107285991 in words is "one hundred seven million, two hundred eighty-five thousand, nine hundred ninety-one".