6723499939 has 4 divisors (see below), whose sum is σ = 7240692256. Its totient is φ = 6206307624.

The previous prime is 6723499919. The next prime is 6723499957. The reversal of 6723499939 is 9399943276.

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

It is a cyclic number.

It is not a de Polignac number, because 6723499939 - 2⁹ = 6723499427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6723499919) 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, 258596139 + ... + 258596164.

It is an arithmetic number, because the mean of its divisors is an integer number (1810173064).

Almost surely, 2^6723499939 is an apocalyptic number.

6723499939 is a deficient number, since it is larger than the sum of its proper divisors (517192317).

6723499939 is a wasteful number, since it uses less digits than its factorization.

6723499939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517192316.

The product of its digits is 19840464, while the sum is 61.

The square root of 6723499939 is about 81996.9507908678. The cubic root of 6723499939 is about 1887.4051471946.

The spelling of 6723499939 in words is "six billion, seven hundred twenty-three million, four hundred ninety-nine thousand, nine hundred thirty-nine".