91321494 has 16 divisors (see below), whose sum is σ = 199247040. Its totient is φ = 27673160.

The previous prime is 91321487. The next prime is 91321499. The reversal of 91321494 is 49412319.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91321499) 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, 691764 + ... + 691895.

It is an arithmetic number, because the mean of its divisors is an integer number (12452940).

Almost surely, 2^91321494 is an apocalyptic number.

91321494 is an abundant number, since it is smaller than the sum of its proper divisors (107925546).

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

91321494 is a wasteful number, since it uses less digits than its factorization.

91321494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383675.

The product of its digits is 7776, while the sum is 33.

The square root of 91321494 is about 9556.2280215575. The cubic root of 91321494 is about 450.3232147075.

The spelling of 91321494 in words is "ninety-one million, three hundred twenty-one thousand, four hundred ninety-four".