91335380 has 18 divisors (see below), whose sum is σ = 191894094. Its totient is φ = 36517056.

The previous prime is 91335379. The next prime is 91335383. The reversal of 91335380 is 8353319.

It can be written as a sum of positive squares in 3 ways, for example, as 5550736 + 85784644 = 2356^2 + 9262^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91335383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 41672 + ... + 43808.

It is an arithmetic number, because the mean of its divisors is an integer number (10660783).

Almost surely, 2^91335380 is an apocalyptic number.

It is an amenable number.

91335380 is an abundant number, since it is smaller than the sum of its proper divisors (100558714).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

91335380 is an equidigital number, since it uses as much as digits as its factorization.

91335380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4283 (or 2144 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 91335380 is about 9556.9545358341. The cubic root of 91335380 is about 450.3460383640.

Adding to 91335380 its reverse (8353319), we get a palindrome (99688699).

The spelling of 91335380 in words is "ninety-one million, three hundred thirty-five thousand, three hundred eighty".