690090933221 has 4 divisors (see below), whose sum is σ = 690104602944. Its totient is φ = 690077263500.

The previous prime is 690090933209. The next prime is 690090933223. The reversal of 690090933221 is 122339090096.

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 690090933221 - 2⁶ = 690090933157 is a prime.

It is a super-2 number, since 2×690090933221² (a number of 24 digits) 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 (690090933223) 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, 6758855 + ... + 6860196.

It is an arithmetic number, because the mean of its divisors is an integer number (172526150736).

Almost surely, 2^690090933221 is an apocalyptic number.

It is an amenable number.

690090933221 is a deficient number, since it is larger than the sum of its proper divisors (13669723).

690090933221 is a wasteful number, since it uses less digits than its factorization.

690090933221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13669722.

The product of its (nonzero) digits is 157464, while the sum is 44.

The spelling of 690090933221 in words is "six hundred ninety billion, ninety million, nine hundred thirty-three thousand, two hundred twenty-one".