91693020 has 48 divisors (see below), whose sum is σ = 258306048. Its totient is φ = 24302400.

The previous prime is 91693013. The next prime is 91693027. The reversal of 91693020 is 2039619.

It is an interprime number because it is at equal distance from previous prime (91693013) and next prime (91693027).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91693027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5445 + ... + 14595.

It is an arithmetic number, because the mean of its divisors is an integer number (5381376).

Almost surely, 2^91693020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 91693020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (129153024).

91693020 is an abundant number, since it is smaller than the sum of its proper divisors (166613028).

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

91693020 is a wasteful number, since it uses less digits than its factorization.

91693020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9330 (or 9328 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 91693020 is about 9575.6472366102. The cubic root of 91693020 is about 450.9330762722.

The spelling of 91693020 in words is "ninety-one million, six hundred ninety-three thousand, twenty".