690443277 has 4 divisors (see below), whose sum is σ = 920591040. Its totient is φ = 460295516.

The previous prime is 690443269. The next prime is 690443291. The reversal of 690443277 is 772344096.

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 690443277 - 2³ = 690443269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690443077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115073877 + ... + 115073882.

It is an arithmetic number, because the mean of its divisors is an integer number (230147760).

Almost surely, 2^690443277 is an apocalyptic number.

It is an amenable number.

690443277 is a deficient number, since it is larger than the sum of its proper divisors (230147763).

690443277 is a wasteful number, since it uses less digits than its factorization.

690443277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230147762.

The product of its (nonzero) digits is 254016, while the sum is 42.

The square root of 690443277 is about 26276.2873519072. The cubic root of 690443277 is about 883.8447808148.

The spelling of 690443277 in words is "six hundred ninety million, four hundred forty-three thousand, two hundred seventy-seven".