91854399 has 16 divisors (see below), whose sum is σ = 150735872. Its totient is φ = 48450528.

The previous prime is 91854337. The next prime is 91854431. The reversal of 91854399 is 99345819.

It is not a de Polignac number, because 91854399 - 2⁹ = 91853887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91852399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167959 + ... + 168504.

It is an arithmetic number, because the mean of its divisors is an integer number (9420992).

Almost surely, 2^91854399 is an apocalyptic number.

91854399 is a deficient number, since it is larger than the sum of its proper divisors (58881473).

91854399 is a wasteful number, since it uses less digits than its factorization.

91854399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 336486.

The product of its digits is 349920, while the sum is 48.

The square root of 91854399 is about 9584.0700644350. The cubic root of 91854399 is about 451.1974674563.

The spelling of 91854399 in words is "ninety-one million, eight hundred fifty-four thousand, three hundred ninety-nine".