91969072 has 40 divisors (see below), whose sum is σ = 193338320. Its totient is φ = 42128640.

The previous prime is 91969067. The next prime is 91969079. The reversal of 91969072 is 27096919.

It is a super-3 number, since 3×91969072³ (a number of 25 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (91969079) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27322 + ... + 30502.

It is an arithmetic number, because the mean of its divisors is an integer number (4833458).

Almost surely, 2^91969072 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 91969072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96669160).

91969072 is an abundant number, since it is smaller than the sum of its proper divisors (101369248).

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

91969072 is a wasteful number, since it uses less digits than its factorization.

91969072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3341 (or 3335 counting only the distinct ones).

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 91969072 is about 9590.0506776555. The cubic root of 91969072 is about 451.3851509042.

The spelling of 91969072 in words is "ninety-one million, nine hundred sixty-nine thousand, seventy-two".