3864970639 has 2 divisors, whose sum is σ = 3864970640. Its totient is φ = 3864970638.

The previous prime is 3864970631. The next prime is 3864970651. The reversal of 3864970639 is 9360794683.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3864970639 - 2³ = 3864970631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3864970639.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3864970631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1932485319 + 1932485320.

It is an arithmetic number, because the mean of its divisors is an integer number (1932485320).

Almost surely, 2^3864970639 is an apocalyptic number.

3864970639 is a deficient number, since it is larger than the sum of its proper divisors (1).

3864970639 is an equidigital number, since it uses as much as digits as its factorization.

3864970639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5878656, while the sum is 55.

The square root of 3864970639 is about 62168.8880309114. Note that the first 3 decimals coincide. The cubic root of 3864970639 is about 1569.3340568926.

The spelling of 3864970639 in words is "three billion, eight hundred sixty-four million, nine hundred seventy thousand, six hundred thirty-nine".