91343644 has 30 divisors (see below), whose sum is σ = 186501784. Its totient is φ = 39143160.

The previous prime is 91343633. The next prime is 91343647. The reversal of 91343644 is 44634319.

It is a super-2 number, since 2×91343644² = 16687322598397472, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91343647) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4849 + ... + 14359.

Almost surely, 2^91343644 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 91343644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93250892).

91343644 is an abundant number, since it is smaller than the sum of its proper divisors (95158140).

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

91343644 is an equidigital number, since it uses as much as digits as its factorization.

91343644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9543 (or 9520 counting only the distinct ones).

The product of its digits is 31104, while the sum is 34.

The square root of 91343644 is about 9557.3868813604. The cubic root of 91343644 is about 450.3596203495.

The spelling of 91343644 in words is "ninety-one million, three hundred forty-three thousand, six hundred forty-four".