91491030 has 24 divisors (see below), whose sum is σ = 237876912. Its totient is φ = 24397584.

The previous prime is 91491011. The next prime is 91491053. The reversal of 91491030 is 3019419.

It is a junction number, because it is equal to n+sod(n) for n = 91490985 and 91491003.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 508194 + ... + 508373.

It is an arithmetic number, because the mean of its divisors is an integer number (9911538).

Almost surely, 2^91491030 is an apocalyptic number.

91491030 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

91491030 is an abundant number, since it is smaller than the sum of its proper divisors (146385882).

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

91491030 is a wasteful number, since it uses less digits than its factorization.

91491030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1016580 (or 1016577 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 91491030 is about 9565.0943539518. The cubic root of 91491030 is about 450.6017135838.

The spelling of 91491030 in words is "ninety-one million, four hundred ninety-one thousand, thirty".