91653140 has 24 divisors (see below), whose sum is σ = 192675840. Its totient is φ = 36622368.

The previous prime is 91653127. The next prime is 91653173. The reversal of 91653140 is 4135619.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23789 + ... + 27371.

It is an arithmetic number, because the mean of its divisors is an integer number (8028160).

Almost surely, 2^91653140 is an apocalyptic number.

It is an amenable number.

91653140 is an abundant number, since it is smaller than the sum of its proper divisors (101022700).

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

91653140 is a wasteful number, since it uses less digits than its factorization.

91653140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4871 (or 4869 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 91653140 is about 9573.5646443736. The cubic root of 91653140 is about 450.8676920919.

Adding to 91653140 its reverse (4135619), we get a palindrome (95788759).

The spelling of 91653140 in words is "ninety-one million, six hundred fifty-three thousand, one hundred forty".