91243008 has 60 divisors (see below), whose sum is σ = 263346798. Its totient is φ = 30412800.

The previous prime is 91243003. The next prime is 91243049. The reversal of 91243008 is 80034219.

It can be written as a sum of positive squares in only one way, i.e., 91240704 + 2304 = 9552^2 + 48^2 .

It is not an unprimeable number, because it can be changed into a prime (91243003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5293 + ... + 14508.

Almost surely, 2^91243008 is an apocalyptic number.

It is an amenable number.

91243008 is an abundant number, since it is smaller than the sum of its proper divisors (172103790).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91243008 is a wasteful number, since it uses less digits than its factorization.

91243008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19825 (or 19806 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 91243008 is about 9552.1206022537. The cubic root of 91243008 is about 450.1941680593.

The spelling of 91243008 in words is "ninety-one million, two hundred forty-three thousand, eight".