91039334401 has 4 divisors (see below), whose sum is σ = 91045126404. Its totient is φ = 91033542400.

The previous prime is 91039334377. The next prime is 91039334443. The reversal of 91039334401 is 10443393019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10443393019 = 2039 ⋅5121821.

It can be written as a sum of positive squares in 2 ways, for example, as 53694158400 + 37345176001 = 231720^2 + 193249^2 .

It is a cyclic number.

It is not a de Polignac number, because 91039334401 - 2⁵ = 91039334369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91039334801) 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, 2872360 + ... + 2903881.

It is an arithmetic number, because the mean of its divisors is an integer number (22761281601).

Almost surely, 2^91039334401 is an apocalyptic number.

It is an amenable number.

91039334401 is a deficient number, since it is larger than the sum of its proper divisors (5792003).

91039334401 is a wasteful number, since it uses less digits than its factorization.

91039334401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5792002.

The product of its (nonzero) digits is 34992, while the sum is 37.

The spelling of 91039334401 in words is "ninety-one billion, thirty-nine million, three hundred thirty-four thousand, four hundred one".