91916351 has 4 divisors (see below), whose sum is σ = 91950000. Its totient is φ = 91882704.

The previous prime is 91916323. The next prime is 91916381. The reversal of 91916351 is 15361919.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15361919 = 37 ⋅415187.

It is a cyclic number.

It is not a de Polignac number, because 91916351 - 2¹⁴ = 91899967 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 (91916381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12326 + ... + 18323.

It is an arithmetic number, because the mean of its divisors is an integer number (22987500).

Almost surely, 2^91916351 is an apocalyptic number.

91916351 is a deficient number, since it is larger than the sum of its proper divisors (33649).

91916351 is a wasteful number, since it uses less digits than its factorization.

91916351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33648.

The product of its digits is 7290, while the sum is 35.

The square root of 91916351 is about 9587.3015494455. The cubic root of 91916351 is about 451.2988826811.

The spelling of 91916351 in words is "ninety-one million, nine hundred sixteen thousand, three hundred fifty-one".