91939712629 has 4 divisors (see below), whose sum is σ = 91942881184. Its totient is φ = 91936544076.

The previous prime is 91939712621. The next prime is 91939712659. The reversal of 91939712629 is 92621793919.

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: 92621793919 = 1429 ⋅64815811.

It is a cyclic number.

It is not a de Polignac number, because 91939712629 - 2³ = 91939712621 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 (91939712621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1540347 + ... + 1598920.

It is an arithmetic number, because the mean of its divisors is an integer number (22985720296).

Almost surely, 2^91939712629 is an apocalyptic number.

It is an amenable number.

91939712629 is a deficient number, since it is larger than the sum of its proper divisors (3168555).

91939712629 is a wasteful number, since it uses less digits than its factorization.

91939712629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3168554.

The product of its digits is 3306744, while the sum is 58.

The spelling of 91939712629 in words is "ninety-one billion, nine hundred thirty-nine million, seven hundred twelve thousand, six hundred twenty-nine".