690886093 has 4 divisors (see below), whose sum is σ = 692260128. Its totient is φ = 689512060.

The previous prime is 690886081. The next prime is 690886109. The reversal of 690886093 is 390688096.

690886093 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 a de Polignac number, because none of the positive numbers 2^k-690886093 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 (690886003) 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, 686263 + ... + 687268.

It is an arithmetic number, because the mean of its divisors is an integer number (173065032).

Almost surely, 2^690886093 is an apocalyptic number.

It is an amenable number.

690886093 is a deficient number, since it is larger than the sum of its proper divisors (1374035).

690886093 is a wasteful number, since it uses less digits than its factorization.

690886093 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1374034.

The product of its (nonzero) digits is 559872, while the sum is 49.

The square root of 690886093 is about 26284.7121536455. The cubic root of 690886093 is about 884.0336918050.

The spelling of 690886093 in words is "six hundred ninety million, eight hundred eighty-six thousand, ninety-three".