1006505653 has 4 divisors (see below), whose sum is σ = 1010219968. Its totient is φ = 1002791340.

The previous prime is 1006505641. The next prime is 1006505663. The reversal of 1006505653 is 3565056001.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1006505653 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 (1006505623) 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, 1856751 + ... + 1857292.

It is an arithmetic number, because the mean of its divisors is an integer number (252554992).

Almost surely, 2^1006505653 is an apocalyptic number.

It is an amenable number.

1006505653 is a deficient number, since it is larger than the sum of its proper divisors (3714315).

1006505653 is an equidigital number, since it uses as much as digits as its factorization.

1006505653 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3714314.

The product of its (nonzero) digits is 13500, while the sum is 31.

The square root of 1006505653 is about 31725.4732510013. The cubic root of 1006505653 is about 1002.1638653096.

The spelling of 1006505653 in words is "one billion, six million, five hundred five thousand, six hundred fifty-three".