8991734 has 4 divisors (see below), whose sum is σ = 13487604. Its totient is φ = 4495866.

The previous prime is 8991713. The next prime is 8991739. The reversal of 8991734 is 4371998.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 4371998 = 2 ⋅2185999.

It is a junction number, because it is equal to n+sod(n) for n = 8991691 and 8991700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8991739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2247932 + ... + 2247935.

It is an arithmetic number, because the mean of its divisors is an integer number (3371901).

Almost surely, 2^8991734 is an apocalyptic number.

8991734 is a deficient number, since it is larger than the sum of its proper divisors (4495870).

8991734 is a wasteful number, since it uses less digits than its factorization.

8991734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4495869.

The product of its digits is 54432, while the sum is 41.

The square root of 8991734 is about 2998.6220168604. The cubic root of 8991734 is about 207.9446814183.

The spelling of 8991734 in words is "eight million, nine hundred ninety-one thousand, seven hundred thirty-four".