91290033 has 12 divisors (see below), whose sum is σ = 133144960. Its totient is φ = 60268536.

The previous prime is 91289993. The next prime is 91290037. The reversal of 91290033 is 33009219.

It is not a de Polignac number, because 91290033 - 2⁶ = 91289969 is a prime.

It is a super-3 number, since 3×91290033³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91289979 and 91290006.

It is not an unprimeable number, because it can be changed into a prime (91290037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48313 + ... + 50166.

Almost surely, 2^91290033 is an apocalyptic number.

It is an amenable number.

91290033 is a deficient number, since it is larger than the sum of its proper divisors (41854927).

91290033 is a wasteful number, since it uses less digits than its factorization.

91290033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98588 (or 98585 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 91290033 is about 9554.5817804863. The cubic root of 91290033 is about 450.2714954268.

The spelling of 91290033 in words is "ninety-one million, two hundred ninety thousand, thirty-three".