91849409 has 8 divisors (see below), whose sum is σ = 95256000. Its totient is φ = 88458832.

The previous prime is 91849399. The next prime is 91849423. The reversal of 91849409 is 90494819.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91849409 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91849409.

It is not an unprimeable number, because it can be changed into a prime (93849409) 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, 8372 + ... + 15930.

It is an arithmetic number, because the mean of its divisors is an integer number (11907000).

Almost surely, 2^91849409 is an apocalyptic number.

It is an amenable number.

91849409 is a deficient number, since it is larger than the sum of its proper divisors (3406591).

91849409 is a wasteful number, since it uses less digits than its factorization.

91849409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8007.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 91849409 is about 9583.8097330863. The cubic root of 91849409 is about 451.1892968582.

The spelling of 91849409 in words is "ninety-one million, eight hundred forty-nine thousand, four hundred nine".