91839801 has 8 divisors (see below), whose sum is σ = 122512480. Its totient is φ = 61196832.

The previous prime is 91839799. The next prime is 91839817. The reversal of 91839801 is 10893819.

It is a happy number.

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

It is not a de Polignac number, because 91839801 - 2¹ = 91839799 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 91839801.

It is not an unprimeable number, because it can be changed into a prime (91839821) 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, 1230 + ... + 13608.

It is an arithmetic number, because the mean of its divisors is an integer number (15314060).

Almost surely, 2^91839801 is an apocalyptic number.

It is an amenable number.

91839801 is a deficient number, since it is larger than the sum of its proper divisors (30672679).

91839801 is a wasteful number, since it uses less digits than its factorization.

91839801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14855.

The product of its (nonzero) digits is 15552, while the sum is 39.

The square root of 91839801 is about 9583.3084579387. The cubic root of 91839801 is about 451.1735639392.

The spelling of 91839801 in words is "ninety-one million, eight hundred thirty-nine thousand, eight hundred one".