3999723489 has 16 divisors (see below), whose sum is σ = 5927751040. Its totient is φ = 2665476720.

The previous prime is 3999723461. The next prime is 3999723491. The reversal of 3999723489 is 9843279993.

3999723489 is a `hidden beast` number, since 399 + 9 + 7 + 234 + 8 + 9 = 666.

It is not a de Polignac number, because 3999723489 - 2¹⁹ = 3999199201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3999723419) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48819 + ... + 101895.

It is an arithmetic number, because the mean of its divisors is an integer number (370484440).

Almost surely, 2^3999723489 is an apocalyptic number.

It is an amenable number.

3999723489 is a deficient number, since it is larger than the sum of its proper divisors (1928027551).

3999723489 is a wasteful number, since it uses less digits than its factorization.

3999723489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55877 (or 55871 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 63.

The square root of 3999723489 is about 63243.3671541925. The cubic root of 3999723489 is about 1587.3644733043.

The spelling of 3999723489 in words is "three billion, nine hundred ninety-nine million, seven hundred twenty-three thousand, four hundred eighty-nine".