8749381 has 4 divisors (see below), whose sum is σ = 8763552. Its totient is φ = 8735212.

The previous prime is 8749357. The next prime is 8749417. The reversal of 8749381 is 1839478.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8749381 - 2¹⁵ = 8716613 is a prime.

It is a super-2 number, since 2×8749381² = 153103335766322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8749331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6115 + ... + 7408.

It is an arithmetic number, because the mean of its divisors is an integer number (2190888).

Almost surely, 2^8749381 is an apocalyptic number.

It is an amenable number.

8749381 is a deficient number, since it is larger than the sum of its proper divisors (14171).

8749381 is a wasteful number, since it uses less digits than its factorization.

8749381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14170.

The product of its digits is 48384, while the sum is 40.

The square root of 8749381 is about 2957.9352596025. The cubic root of 8749381 is about 206.0594056842.

Subtracting from 8749381 its reverse (1839478), we obtain a triangular number (6909903 = T₃₇₁₇).

The spelling of 8749381 in words is "eight million, seven hundred forty-nine thousand, three hundred eighty-one".