91339939 has 8 divisors (see below), whose sum is σ = 93928400. Its totient is φ = 88757856.

The previous prime is 91339933. The next prime is 91339943. The reversal of 91339939 is 93993319.

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 91339939 - 2⁷ = 91339811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91339933) 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, 52912 + ... + 54610.

It is an arithmetic number, because the mean of its divisors is an integer number (11741050).

Almost surely, 2^91339939 is an apocalyptic number.

91339939 is a deficient number, since it is larger than the sum of its proper divisors (2588461).

91339939 is a wasteful number, since it uses less digits than its factorization.

91339939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3189.

The product of its digits is 177147, while the sum is 46.

The square root of 91339939 is about 9557.1930502632. The cubic root of 91339939 is about 450.3535312378.

The spelling of 91339939 in words is "ninety-one million, three hundred thirty-nine thousand, nine hundred thirty-nine".