91493039 has 4 divisors (see below), whose sum is σ = 99810600. Its totient is φ = 83175480.

The previous prime is 91493029. The next prime is 91493047. The reversal of 91493039 is 93039419.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 91493039 - 2⁸ = 91492783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91492993 and 91493011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91493009) 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, 4158764 + ... + 4158785.

It is an arithmetic number, because the mean of its divisors is an integer number (24952650).

Almost surely, 2^91493039 is an apocalyptic number.

91493039 is a deficient number, since it is larger than the sum of its proper divisors (8317561).

91493039 is a wasteful number, since it uses less digits than its factorization.

91493039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8317560.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 91493039 is about 9565.1993706352. The cubic root of 91493039 is about 450.6050117294.

The spelling of 91493039 in words is "ninety-one million, four hundred ninety-three thousand, thirty-nine".