6319409749 has 4 divisors (see below), whose sum is σ = 6537320460. Its totient is φ = 6101499040.

The previous prime is 6319409743. The next prime is 6319409771. The reversal of 6319409749 is 9479049136.

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 3567672900 + 2751736849 = 59730^2 + 52457^2 .

It is a cyclic number.

It is not a de Polignac number, because 6319409749 - 2⁵ = 6319409717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6319409696 and 6319409705.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6319409743) 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, 108955312 + ... + 108955369.

It is an arithmetic number, because the mean of its divisors is an integer number (1634330115).

Almost surely, 2^6319409749 is an apocalyptic number.

It is an amenable number.

6319409749 is a deficient number, since it is larger than the sum of its proper divisors (217910711).

6319409749 is a wasteful number, since it uses less digits than its factorization.

6319409749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217910710.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The square root of 6319409749 is about 79494.7152268627. The cubic root of 6319409749 is about 1848.8095334959.

The spelling of 6319409749 in words is "six billion, three hundred nineteen million, four hundred nine thousand, seven hundred forty-nine".