3990650613 has 4 divisors (see below), whose sum is σ = 5320867488. Its totient is φ = 2660433740.

The previous prime is 3990650611. The next prime is 3990650623. The reversal of 3990650613 is 3160560993.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3160560993 = 3 ⋅1053520331.

It is a cyclic number.

It is not a de Polignac number, because 3990650613 - 2¹ = 3990650611 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990650611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 665108433 + ... + 665108438.

It is an arithmetic number, because the mean of its divisors is an integer number (1330216872).

Almost surely, 2^3990650613 is an apocalyptic number.

It is an amenable number.

3990650613 is a deficient number, since it is larger than the sum of its proper divisors (1330216875).

3990650613 is a wasteful number, since it uses less digits than its factorization.

3990650613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1330216874.

The product of its (nonzero) digits is 131220, while the sum is 42.

The square root of 3990650613 is about 63171.5965683946. The cubic root of 3990650613 is about 1586.1633182325.

The spelling of 3990650613 in words is "three billion, nine hundred ninety million, six hundred fifty thousand, six hundred thirteen".