3999554 has 12 divisors (see below), whose sum is σ = 6496866. Its totient is φ = 1845792.

The previous prime is 3999547. The next prime is 3999563. The reversal of 3999554 is 4559993.

It can be written as a sum of positive squares in 3 ways, for example, as 3045025 + 954529 = 1745^2 + 977^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5579 + ... + 6254.

Almost surely, 2^3999554 is an apocalyptic number.

3999554 is a deficient number, since it is larger than the sum of its proper divisors (2497312).

3999554 is a wasteful number, since it uses less digits than its factorization.

3999554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11861 (or 11848 counting only the distinct ones).

The product of its digits is 218700, while the sum is 44.

The square root of 3999554 is about 1999.8884968918. Note that the first 3 decimals coincide. The cubic root of 3999554 is about 158.7342051370.

The spelling of 3999554 in words is "three million, nine hundred ninety-nine thousand, five hundred fifty-four".