690835321 has 4 divisors (see below), whose sum is σ = 753638544. Its totient is φ = 628032100.

The previous prime is 690835283. The next prime is 690835333. The reversal of 690835321 is 123538096.

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 690835321 - 2¹³ = 690827129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (690835381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31401595 + ... + 31401616.

It is an arithmetic number, because the mean of its divisors is an integer number (188409636).

Almost surely, 2^690835321 is an apocalyptic number.

It is an amenable number.

690835321 is a deficient number, since it is larger than the sum of its proper divisors (62803223).

690835321 is a wasteful number, since it uses less digits than its factorization.

690835321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62803222.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 690835321 is about 26283.7463273408. The cubic root of 690835321 is about 884.0120359158.

The spelling of 690835321 in words is "six hundred ninety million, eight hundred thirty-five thousand, three hundred twenty-one".