91139633 has 8 divisors (see below), whose sum is σ = 98251776. Its totient is φ = 84042000.

The previous prime is 91139611. The next prime is 91139641. The reversal of 91139633 is 33693119.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91139633 - 2⁶ = 91139569 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91139593 and 91139602.

It is not an unprimeable number, because it can be changed into a prime (91139683) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11918 + ... + 18008.

It is an arithmetic number, because the mean of its divisors is an integer number (12281472).

Almost surely, 2^91139633 is an apocalyptic number.

It is an amenable number.

91139633 is a deficient number, since it is larger than the sum of its proper divisors (7112143).

91139633 is a wasteful number, since it uses less digits than its factorization.

91139633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7255.

The product of its digits is 13122, while the sum is 35.

The square root of 91139633 is about 9546.7079666239. The cubic root of 91139633 is about 450.0240859536.

The spelling of 91139633 in words is "ninety-one million, one hundred thirty-nine thousand, six hundred thirty-three".