91388470629 has 4 divisors (see below), whose sum is σ = 121851294176. Its totient is φ = 60925647084.

The previous prime is 91388470619. The next prime is 91388470717. The reversal of 91388470629 is 92607488319.

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.

It is not a de Polignac number, because 91388470629 - 2⁸ = 91388470373 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 (91388470609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15231411769 + ... + 15231411774.

It is an arithmetic number, because the mean of its divisors is an integer number (30462823544).

Almost surely, 2^91388470629 is an apocalyptic number.

It is an amenable number.

91388470629 is a deficient number, since it is larger than the sum of its proper divisors (30462823547).

91388470629 is a wasteful number, since it uses less digits than its factorization.

91388470629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30462823546.

The product of its (nonzero) digits is 5225472, while the sum is 57.

The spelling of 91388470629 in words is "ninety-one billion, three hundred eighty-eight million, four hundred seventy thousand, six hundred twenty-nine".