3999487 has 2 divisors, whose sum is σ = 3999488. Its totient is φ = 3999486.

The previous prime is 3999467. The next prime is 3999491. The reversal of 3999487 is 7849993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 3999487 - 2¹⁵ = 3966719 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3999487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3999467) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1999743 + 1999744.

It is an arithmetic number, because the mean of its divisors is an integer number (1999744).

Almost surely, 2^3999487 is an apocalyptic number.

3999487 is a deficient number, since it is larger than the sum of its proper divisors (1).

3999487 is an equidigital number, since it uses as much as digits as its factorization.

3999487 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 49.

The square root of 3999487 is about 1999.8717458877. The cubic root of 3999487 is about 158.7333187672.

The spelling of 3999487 in words is "three million, nine hundred ninety-nine thousand, four hundred eighty-seven".