3990610493 has 4 divisors (see below), whose sum is σ = 3992207328. Its totient is φ = 3989013660.

The previous prime is 3990610387. The next prime is 3990610513. The reversal of 3990610493 is 3940160993.

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: 3940160993 = 43 ⋅91631651.

It is a cyclic number.

It is not a de Polignac number, because 3990610493 - 2²⁴ = 3973833277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3990610093) 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, 794663 + ... + 799668.

It is an arithmetic number, because the mean of its divisors is an integer number (998051832).

Almost surely, 2^3990610493 is an apocalyptic number.

It is an amenable number.

3990610493 is a deficient number, since it is larger than the sum of its proper divisors (1596835).

3990610493 is a wasteful number, since it uses less digits than its factorization.

3990610493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596834.

The product of its (nonzero) digits is 157464, while the sum is 44.

The square root of 3990610493 is about 63171.2790198204. The cubic root of 3990610493 is about 1586.1580027178.

The spelling of 3990610493 in words is "three billion, nine hundred ninety million, six hundred ten thousand, four hundred ninety-three".