91234689 has 32 divisors (see below), whose sum is σ = 150635520. Its totient is φ = 47829312.

The previous prime is 91234673. The next prime is 91234697. The reversal of 91234689 is 98643219.

It is not a de Polignac number, because 91234689 - 2⁴ = 91234673 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91234689.

It is not an unprimeable number, because it can be changed into a prime (91234669) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 47934 + ... + 49800.

It is an arithmetic number, because the mean of its divisors is an integer number (4707360).

Almost surely, 2^91234689 is an apocalyptic number.

It is an amenable number.

91234689 is a deficient number, since it is larger than the sum of its proper divisors (59400831).

91234689 is a wasteful number, since it uses less digits than its factorization.

91234689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2069.

The product of its digits is 93312, while the sum is 42.

The square root of 91234689 is about 9551.6851392830. The cubic root of 91234689 is about 450.1804856260.

The spelling of 91234689 in words is "ninety-one million, two hundred thirty-four thousand, six hundred eighty-nine".