990343693 has 4 divisors (see below), whose sum is σ = 990413568. Its totient is φ = 990273820.

The previous prime is 990343691. The next prime is 990343699. The reversal of 990343693 is 396343099.

990343693 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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 990343693 - 2¹ = 990343691 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 (990343691) 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, 5293 + ... + 44818.

It is an arithmetic number, because the mean of its divisors is an integer number (247603392).

Almost surely, 2^990343693 is an apocalyptic number.

It is an amenable number.

990343693 is a deficient number, since it is larger than the sum of its proper divisors (69875).

990343693 is a wasteful number, since it uses less digits than its factorization.

990343693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69874.

The product of its (nonzero) digits is 472392, while the sum is 46.

The square root of 990343693 is about 31469.7266114595. The cubic root of 990343693 is about 996.7708145858.

The spelling of 990343693 in words is "nine hundred ninety million, three hundred forty-three thousand, six hundred ninety-three".