91961318 has 8 divisors (see below), whose sum is σ = 138307080. Its totient is φ = 45858960.

The previous prime is 91961299. The next prime is 91961323. The reversal of 91961318 is 81316919.

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

It is a super-3 number, since 3×91961318³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59903 + ... + 61418.

It is an arithmetic number, because the mean of its divisors is an integer number (17288385).

Almost surely, 2^91961318 is an apocalyptic number.

91961318 is a deficient number, since it is larger than the sum of its proper divisors (46345762).

91961318 is a wasteful number, since it uses less digits than its factorization.

91961318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121702.

The product of its digits is 11664, while the sum is 38.

The square root of 91961318 is about 9589.6463959835. The cubic root of 91961318 is about 451.3724649771.

The spelling of 91961318 in words is "ninety-one million, nine hundred sixty-one thousand, three hundred eighteen".