91294249613 has 4 divisors (see below), whose sum is σ = 104336285280. Its totient is φ = 78252213948.

The previous prime is 91294249603. The next prime is 91294249663. The reversal of 91294249613 is 31694249219.

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: 31694249219 = 124781 ⋅253999.

It is a cyclic number.

It is not a de Polignac number, because 91294249613 - 2⁶ = 91294249549 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 (91294249603) 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, 6521017823 + ... + 6521017836.

It is an arithmetic number, because the mean of its divisors is an integer number (26084071320).

Almost surely, 2^91294249613 is an apocalyptic number.

It is an amenable number.

91294249613 is a deficient number, since it is larger than the sum of its proper divisors (13042035667).

91294249613 is a wasteful number, since it uses less digits than its factorization.

91294249613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13042035666.

The product of its digits is 839808, while the sum is 50.

The spelling of 91294249613 in words is "ninety-one billion, two hundred ninety-four million, two hundred forty-nine thousand, six hundred thirteen".