91439529083 has 4 divisors (see below), whose sum is σ = 104502318960. Its totient is φ = 78376739208.

The previous prime is 91439529011. The next prime is 91439529089. The reversal of 91439529083 is 38092593419.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38092593419 = 601 ⋅63382019.

It is a cyclic number.

It is not a de Polignac number, because 91439529083 - 2¹⁴ = 91439512699 is a prime.

It is a super-2 number, since 2×91439529083² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91439529089) 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, 6531394928 + ... + 6531394941.

It is an arithmetic number, because the mean of its divisors is an integer number (26125579740).

Almost surely, 2^91439529083 is an apocalyptic number.

91439529083 is a deficient number, since it is larger than the sum of its proper divisors (13062789877).

91439529083 is a wasteful number, since it uses less digits than its factorization.

91439529083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13062789876.

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 91439529083 in words is "ninety-one billion, four hundred thirty-nine million, five hundred twenty-nine thousand, eighty-three".