91553369 has 8 divisors (see below), whose sum is σ = 94719240. Its totient is φ = 88432000.

The previous prime is 91553359. The next prime is 91553383. The reversal of 91553369 is 96335519.

It can be written as a sum of positive squares in 4 ways, for example, as 3193369 + 88360000 = 1787^2 + 9400^2 .

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 91553369 - 2¹² = 91549273 is a prime.

It is a super-2 number, since 2×91553369² = 16764038750500322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91553359) 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 7 ways as a sum of consecutive naturals, for example, 6914 + ... + 15195.

It is an arithmetic number, because the mean of its divisors is an integer number (11839905).

Almost surely, 2^91553369 is an apocalyptic number.

It is an amenable number.

91553369 is a deficient number, since it is larger than the sum of its proper divisors (3165871).

91553369 is a wasteful number, since it uses less digits than its factorization.

91553369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22251.

The product of its digits is 109350, while the sum is 41.

The square root of 91553369 is about 9568.3524705145. The cubic root of 91553369 is about 450.7040321126.

The spelling of 91553369 in words is "ninety-one million, five hundred fifty-three thousand, three hundred sixty-nine".