91395413 has 4 divisors (see below), whose sum is σ = 91430508. Its totient is φ = 91360320.

The previous prime is 91395397. The next prime is 91395427. The reversal of 91395413 is 31459319.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31459319 = 71 ⋅443089.

It can be written as a sum of positive squares in 2 ways, for example, as 20448484 + 70946929 = 4522^2 + 8423^2 .

It is a cyclic number.

It is not a de Polignac number, because 91395413 - 2⁴ = 91395397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91395433) 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, 13298 + ... + 18963.

It is an arithmetic number, because the mean of its divisors is an integer number (22857627).

Almost surely, 2^91395413 is an apocalyptic number.

It is an amenable number.

91395413 is a deficient number, since it is larger than the sum of its proper divisors (35095).

91395413 is a wasteful number, since it uses less digits than its factorization.

91395413 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35094.

The product of its digits is 14580, while the sum is 35.

The square root of 91395413 is about 9560.0948217055. The cubic root of 91395413 is about 450.4446847029. Note that the first 3 decimals are identical.

The spelling of 91395413 in words is "ninety-one million, three hundred ninety-five thousand, four hundred thirteen".