8402509949 has 4 divisors (see below), whose sum is σ = 8416824864. Its totient is φ = 8388195036.

The previous prime is 8402509933. The next prime is 8402509961. The reversal of 8402509949 is 9499052048.

It is a happy number.

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 8402509949 - 2⁴ = 8402509933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8402509897 and 8402509906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8402509649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7156577 + ... + 7157750.

It is an arithmetic number, because the mean of its divisors is an integer number (2104206216).

Almost surely, 2^8402509949 is an apocalyptic number.

It is an amenable number.

8402509949 is a deficient number, since it is larger than the sum of its proper divisors (14314915).

8402509949 is a wasteful number, since it uses less digits than its factorization.

8402509949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14314914.

The product of its (nonzero) digits is 933120, while the sum is 50.

The square root of 8402509949 is about 91665.2057707831. The cubic root of 8402509949 is about 2032.9951619606.

The spelling of 8402509949 in words is "eight billion, four hundred two million, five hundred nine thousand, nine hundred forty-nine".