91004859 has 48 divisors (see below), whose sum is σ = 158505984. Its totient is φ = 49632000.

The previous prime is 91004857. The next prime is 91004861. The reversal of 91004859 is 95840019.

It is an interprime number because it is at equal distance from previous prime (91004857) and next prime (91004861).

It is not a de Polignac number, because 91004859 - 2¹ = 91004857 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91004857) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37534 + ... + 39884.

It is an arithmetic number, because the mean of its divisors is an integer number (3302208).

Almost surely, 2^91004859 is an apocalyptic number.

91004859 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

91004859 is a deficient number, since it is larger than the sum of its proper divisors (67501125).

91004859 is a wasteful number, since it uses less digits than its factorization.

91004859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2405 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 91004859 is about 9539.6466915709. The cubic root of 91004859 is about 449.8021500618.

The spelling of 91004859 in words is "ninety-one million, four thousand, eight hundred fifty-nine".