91849457 has 8 divisors (see below), whose sum is σ = 105259776. Its totient is φ = 78511392.

The previous prime is 91849447. The next prime is 91849481. The reversal of 91849457 is 75494819.

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

It is a cyclic number.

It is not a de Polignac number, because 91849457 - 2⁴ = 91849441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91849447) 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, 15308 + ... + 20445.

It is an arithmetic number, because the mean of its divisors is an integer number (13157472).

Almost surely, 2^91849457 is an apocalyptic number.

It is an amenable number.

91849457 is a deficient number, since it is larger than the sum of its proper divisors (13410319).

91849457 is a wasteful number, since it uses less digits than its factorization.

91849457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36127.

The product of its digits is 362880, while the sum is 47.

The square root of 91849457 is about 9583.8122373093. The cubic root of 91849457 is about 451.1893754545.

The spelling of 91849457 in words is "ninety-one million, eight hundred forty-nine thousand, four hundred fifty-seven".