91423275905 has 8 divisors (see below), whose sum is σ = 118147002792. Its totient is φ = 67512572928.

The previous prime is 91423275871. The next prime is 91423275941. The reversal of 91423275905 is 50957232419.

It can be written as a sum of positive squares in 4 ways, for example, as 20014609729 + 71408666176 = 141473^2 + 267224^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 91423275905 - 2⁶ = 91423275841 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91423275905.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 703255904 + ... + 703256033.

It is an arithmetic number, because the mean of its divisors is an integer number (14768375349).

Almost surely, 2^91423275905 is an apocalyptic number.

It is an amenable number.

91423275905 is a deficient number, since it is larger than the sum of its proper divisors (26723726887).

91423275905 is a wasteful number, since it uses less digits than its factorization.

91423275905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1406511955.

The product of its (nonzero) digits is 680400, while the sum is 47.

The spelling of 91423275905 in words is "ninety-one billion, four hundred twenty-three million, two hundred seventy-five thousand, nine hundred five".