91331413 has 8 divisors (see below), whose sum is σ = 95398848. Its totient is φ = 87272064.

The previous prime is 91331389. The next prime is 91331419. The reversal of 91331413 is 31413319.

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 91331413 - 2¹⁷ = 91200341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91331419) 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, 39045 + ... + 41317.

It is an arithmetic number, because the mean of its divisors is an integer number (11924856).

Almost surely, 2^91331413 is an apocalyptic number.

It is an amenable number.

91331413 is a deficient number, since it is larger than the sum of its proper divisors (4067435).

91331413 is a wasteful number, since it uses less digits than its factorization.

91331413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4043.

The product of its digits is 972, while the sum is 25.

The square root of 91331413 is about 9556.7469883847. The cubic root of 91331413 is about 450.3395182597.

The spelling of 91331413 in words is "ninety-one million, three hundred thirty-one thousand, four hundred thirteen".