91234505 has 12 divisors (see below), whose sum is σ = 110536140. Its totient is φ = 72291072.

The previous prime is 91234487. The next prime is 91234531. The reversal of 91234505 is 50543219.

It can be written as a sum of positive squares in 6 ways, for example, as 63313849 + 27920656 = 7957^2 + 5284^2 .

It is not a de Polignac number, because 91234505 - 2⁶ = 91234441 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 63131 + ... + 64559.

It is an arithmetic number, because the mean of its divisors is an integer number (9211345).

Almost surely, 2^91234505 is an apocalyptic number.

It is an amenable number.

91234505 is a deficient number, since it is larger than the sum of its proper divisors (19301635).

91234505 is a wasteful number, since it uses less digits than its factorization.

91234505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1660 (or 1547 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 91234505 is about 9551.6755074699. The cubic root of 91234505 is about 450.1801829879.

The spelling of 91234505 in words is "ninety-one million, two hundred thirty-four thousand, five hundred five".