91419321 has 8 divisors (see below), whose sum is σ = 139305664. Its totient is φ = 52239600.

The previous prime is 91419311. The next prime is 91419323. The reversal of 91419321 is 12391419.

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

It is not a de Polignac number, because 91419321 - 2¹¹ = 91417273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91419323) 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, 2176630 + ... + 2176671.

It is an arithmetic number, because the mean of its divisors is an integer number (17413208).

Almost surely, 2^91419321 is an apocalyptic number.

It is an amenable number.

91419321 is a deficient number, since it is larger than the sum of its proper divisors (47886343).

91419321 is a wasteful number, since it uses less digits than its factorization.

91419321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4353311.

The product of its digits is 1944, while the sum is 30.

The square root of 91419321 is about 9561.3451459510. The cubic root of 91419321 is about 450.4839583465.

The spelling of 91419321 in words is "ninety-one million, four hundred nineteen thousand, three hundred twenty-one".