91799551 has 8 divisors (see below), whose sum is σ = 93932784. Its totient is φ = 89681280.

The previous prime is 91799549. The next prime is 91799563. The reversal of 91799551 is 15599719.

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 91799551 - 2¹ = 91799549 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91799251) 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, 9180 + ... + 16366.

It is an arithmetic number, because the mean of its divisors is an integer number (11741598).

Almost surely, 2^91799551 is an apocalyptic number.

91799551 is a deficient number, since it is larger than the sum of its proper divisors (2133233).

91799551 is a wasteful number, since it uses less digits than its factorization.

91799551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7481.

The product of its digits is 127575, while the sum is 46.

The square root of 91799551 is about 9581.2082223486. The cubic root of 91799551 is about 451.1076433931.

The spelling of 91799551 in words is "ninety-one million, seven hundred ninety-nine thousand, five hundred fifty-one".