8749891 has 2 divisors, whose sum is σ = 8749892. Its totient is φ = 8749890.

The previous prime is 8749847. The next prime is 8749903. The reversal of 8749891 is 1989478.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8749891 - 2¹³ = 8741699 is a prime.

8749891 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (8749841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4374945 + 4374946.

It is an arithmetic number, because the mean of its divisors is an integer number (4374946).

Almost surely, 2^8749891 is an apocalyptic number.

8749891 is a deficient number, since it is larger than the sum of its proper divisors (1).

8749891 is an equidigital number, since it uses as much as digits as its factorization.

8749891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The square root of 8749891 is about 2958.0214671297. The cubic root of 8749891 is about 206.0634093295.

The spelling of 8749891 in words is "eight million, seven hundred forty-nine thousand, eight hundred ninety-one".