91413043213 has 4 divisors (see below), whose sum is σ = 91471381120. Its totient is φ = 91354705308.

The previous prime is 91413043207. The next prime is 91413043217. The reversal of 91413043213 is 31234031419.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31234031419 = 2969 ⋅10520051.

It is a cyclic number.

It is not a de Polignac number, because 91413043213 - 2⁹ = 91413042701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91413043217) 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, 29166603 + ... + 29169736.

It is an arithmetic number, because the mean of its divisors is an integer number (22867845280).

Almost surely, 2^91413043213 is an apocalyptic number.

It is an amenable number.

91413043213 is a deficient number, since it is larger than the sum of its proper divisors (58337907).

91413043213 is a wasteful number, since it uses less digits than its factorization.

91413043213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58337906.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 91413043213 in words is "ninety-one billion, four hundred thirteen million, forty-three thousand, two hundred thirteen".