8430749 has 4 divisors (see below), whose sum is σ = 8569020. Its totient is φ = 8292480.

The previous prime is 8430739. The next prime is 8430757. The reversal of 8430749 is 9470348.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1194649 + 7236100 = 1093^2 + 2690^2 .

It is a cyclic number.

It is not a de Polignac number, because 8430749 - 2⁸ = 8430493 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8430739) 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, 69044 + ... + 69165.

It is an arithmetic number, because the mean of its divisors is an integer number (2142255).

Almost surely, 2^8430749 is an apocalyptic number.

It is an amenable number.

8430749 is a deficient number, since it is larger than the sum of its proper divisors (138271).

8430749 is a wasteful number, since it uses less digits than its factorization.

8430749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138270.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 8430749 is about 2903.5752099782. The cubic root of 8430749 is about 203.5270103619.

The spelling of 8430749 in words is "eight million, four hundred thirty thousand, seven hundred forty-nine".