990263653 has 4 divisors (see below), whose sum is σ = 991380960. Its totient is φ = 989146348.

The previous prime is 990263647. The next prime is 990263711. The reversal of 990263653 is 356362099.

990263653 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 990263653 - 2²⁹ = 453392741 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 (990269653) 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, 557323 + ... + 559096.

It is an arithmetic number, because the mean of its divisors is an integer number (247845240).

Almost surely, 2^990263653 is an apocalyptic number.

It is an amenable number.

990263653 is a deficient number, since it is larger than the sum of its proper divisors (1117307).

990263653 is a wasteful number, since it uses less digits than its factorization.

990263653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1117306.

The product of its (nonzero) digits is 262440, while the sum is 43.

The square root of 990263653 is about 31468.4548873948. The cubic root of 990263653 is about 996.7439607148.

The spelling of 990263653 in words is "nine hundred ninety million, two hundred sixty-three thousand, six hundred fifty-three".