1639113493 has 16 divisors (see below), whose sum is σ = 1684552896. Its totient is φ = 1594391040.

The previous prime is 1639113479. The next prime is 1639113521. The reversal of 1639113493 is 3943119361.

It is a cyclic number.

It is not a de Polignac number, because 1639113493 - 2¹³ = 1639105301 is a prime.

It is a super-2 number, since 2×1639113493² = 5373386085869322098, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1639113433) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3509646 + ... + 3510112.

It is an arithmetic number, because the mean of its divisors is an integer number (105284556).

Almost surely, 2^1639113493 is an apocalyptic number.

It is an amenable number.

1639113493 is a deficient number, since it is larger than the sum of its proper divisors (45439403).

1639113493 is a wasteful number, since it uses less digits than its factorization.

1639113493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044.

The product of its digits is 52488, while the sum is 40.

The square root of 1639113493 is about 40485.9666180764. The cubic root of 1639113493 is about 1179.0611830297.

The spelling of 1639113493 in words is "one billion, six hundred thirty-nine million, one hundred thirteen thousand, four hundred ninety-three".