91089004 has 6 divisors (see below), whose sum is σ = 159405764. Its totient is φ = 45544500.

The previous prime is 91089001. The next prime is 91089023. The reversal of 91089004 is 40098019.

It is a super-3 number, since 3×91089004³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91089001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11386122 + ... + 11386129.

Almost surely, 2^91089004 is an apocalyptic number.

It is an amenable number.

91089004 is a deficient number, since it is larger than the sum of its proper divisors (68316760).

91089004 is a wasteful number, since it uses less digits than its factorization.

91089004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22772255 (or 22772253 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 91089004 is about 9544.0559512191. The cubic root of 91089004 is about 449.9407395214.

The spelling of 91089004 in words is "ninety-one million, eighty-nine thousand, four".