3990499 has 4 divisors (see below), whose sum is σ = 4005936. Its totient is φ = 3975064.

The previous prime is 3990473. The next prime is 3990509. The reversal of 3990499 is 9940993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9940993 = 83 ⋅119771.

It is a cyclic number.

It is not a de Polignac number, because 3990499 - 2¹¹ = 3988451 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (3990419) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7324 + ... + 7849.

It is an arithmetic number, because the mean of its divisors is an integer number (1001484).

Almost surely, 2^3990499 is an apocalyptic number.

3990499 is a deficient number, since it is larger than the sum of its proper divisors (15437).

3990499 is a wasteful number, since it uses less digits than its factorization.

3990499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15436.

The product of its (nonzero) digits is 78732, while the sum is 43.

The square root of 3990499 is about 1997.6233378693. The cubic root of 3990499 is about 158.6143230779.

It can be divided in two parts, 3990 and 499, that multiplied together give a triangular number (1991010 = T₁₉₉₅).

The spelling of 3990499 in words is "three million, nine hundred ninety thousand, four hundred ninety-nine".