91798415 has 8 divisors (see below), whose sum is σ = 111485808. Its totient is φ = 72553600.

The previous prime is 91798373. The next prime is 91798417. The reversal of 91798415 is 51489719.

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

It is a de Polignac number, because none of the positive numbers 2^k-91798415 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91798417) 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, 110186 + ... + 111015.

It is an arithmetic number, because the mean of its divisors is an integer number (13935726).

Almost surely, 2^91798415 is an apocalyptic number.

91798415 is a deficient number, since it is larger than the sum of its proper divisors (19687393).

91798415 is a wasteful number, since it uses less digits than its factorization.

91798415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221289.

The product of its digits is 90720, while the sum is 44.

The square root of 91798415 is about 9581.1489394540. The cubic root of 91798415 is about 451.1057825983.

The spelling of 91798415 in words is "ninety-one million, seven hundred ninety-eight thousand, four hundred fifteen".