690082241 has 4 divisors (see below), whose sum is σ = 730675332. Its totient is φ = 649489152.

The previous prime is 690082219. The next prime is 690082249. The reversal of 690082241 is 142280096.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 338707216 + 351375025 = 18404^2 + 18745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-690082241 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 690082198 and 690082207.

It is not an unprimeable number, because it can be changed into a prime (690082249) 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, 20296520 + ... + 20296553.

It is an arithmetic number, because the mean of its divisors is an integer number (182668833).

Almost surely, 2^690082241 is an apocalyptic number.

It is an amenable number.

690082241 is a deficient number, since it is larger than the sum of its proper divisors (40593091).

690082241 is a wasteful number, since it uses less digits than its factorization.

690082241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40593090.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 690082241 is about 26269.4164571655. The cubic root of 690082241 is about 883.6906984396.

The spelling of 690082241 in words is "six hundred ninety million, eighty-two thousand, two hundred forty-one".