91601279 has 8 divisors (see below), whose sum is σ = 114204288. Its totient is φ = 71377560.

The previous prime is 91601269. The next prime is 91601297. The reversal of 91601279 is 97210619.

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 91601279 - 2¹² = 91597183 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91601239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594737 + ... + 594890.

It is an arithmetic number, because the mean of its divisors is an integer number (14275536).

Almost surely, 2^91601279 is an apocalyptic number.

91601279 is a deficient number, since it is larger than the sum of its proper divisors (22603009).

91601279 is a wasteful number, since it uses less digits than its factorization.

91601279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189645.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 91601279 is about 9570.8557088695. The cubic root of 91601279 is about 450.7826364098.

The spelling of 91601279 in words is "ninety-one million, six hundred one thousand, two hundred seventy-nine".