91813001 has 8 divisors (see below), whose sum is σ = 105032640. Its totient is φ = 78619248.

The previous prime is 91812977. The next prime is 91813009. The reversal of 91813001 is 10031819.

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 91813001 - 2¹⁸ = 91550857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91813009) 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, 1850 + ... + 13676.

It is an arithmetic number, because the mean of its divisors is an integer number (13129080).

Almost surely, 2^91813001 is an apocalyptic number.

It is an amenable number.

91813001 is a deficient number, since it is larger than the sum of its proper divisors (13219639).

91813001 is a wasteful number, since it uses less digits than its factorization.

91813001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12943.

The product of its (nonzero) digits is 216, while the sum is 23.

The square root of 91813001 is about 9581.9100914171. The cubic root of 91813001 is about 451.1296736443.

The spelling of 91813001 in words is "ninety-one million, eight hundred thirteen thousand, one".