3990273689 has 2 divisors, whose sum is σ = 3990273690. Its totient is φ = 3990273688.

The previous prime is 3990273673. The next prime is 3990273719. The reversal of 3990273689 is 9863720993.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3933422089 + 56851600 = 62717^2 + 7540^2 .

It is a cyclic number.

It is not a de Polignac number, because 3990273689 - 2⁴ = 3990273673 is a prime.

It is a super-2 number, since 2×3990273689² = 31844568226251337442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (3990293689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1995136844 + 1995136845.

It is an arithmetic number, because the mean of its divisors is an integer number (1995136845).

Almost surely, 2^3990273689 is an apocalyptic number.

It is an amenable number.

3990273689 is a deficient number, since it is larger than the sum of its proper divisors (1).

3990273689 is an equidigital number, since it uses as much as digits as its factorization.

3990273689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4408992, while the sum is 56.

The square root of 3990273689 is about 63168.6131635007. The cubic root of 3990273689 is about 1586.1133780177.

The spelling of 3990273689 in words is "three billion, nine hundred ninety million, two hundred seventy-three thousand, six hundred eighty-nine".