91284734 has 4 divisors (see below), whose sum is σ = 136927104. Its totient is φ = 45642366.

The previous prime is 91284733. The next prime is 91284749. The reversal of 91284734 is 43748219.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43748219 = 317 ⋅138007.

It is a super-2 number, since 2×91284734² = 16665805322901512, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91284733) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22821182 + ... + 22821185.

It is an arithmetic number, because the mean of its divisors is an integer number (34231776).

Almost surely, 2^91284734 is an apocalyptic number.

91284734 is a deficient number, since it is larger than the sum of its proper divisors (45642370).

91284734 is a wasteful number, since it uses less digits than its factorization.

91284734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45642369.

The product of its digits is 48384, while the sum is 38.

The square root of 91284734 is about 9554.3044749474. The cubic root of 91284734 is about 450.2627831401.

The spelling of 91284734 in words is "ninety-one million, two hundred eighty-four thousand, seven hundred thirty-four".