690080441 has 2 divisors, whose sum is σ = 690080442. Its totient is φ = 690080440.

The previous prime is 690080401. The next prime is 690080449. The reversal of 690080441 is 144080096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 655564816 + 34515625 = 25604^2 + 5875^2 .

It is a cyclic number.

It is not a de Polignac number, because 690080441 - 2¹⁰ = 690079417 is a prime.

It is a super-2 number, since 2×690080441² = 952422030101508962, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 690080398 and 690080407.

It is not a weakly prime, because it can be changed into another prime (690080449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345040220 + 345040221.

It is an arithmetic number, because the mean of its divisors is an integer number (345040221).

Almost surely, 2^690080441 is an apocalyptic number.

It is an amenable number.

690080441 is a deficient number, since it is larger than the sum of its proper divisors (1).

690080441 is an equidigital number, since it uses as much as digits as its factorization.

690080441 is an evil number, because the sum of its binary digits is even.

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

The square root of 690080441 is about 26269.3821967704. The cubic root of 690080441 is about 883.6899301038.

The spelling of 690080441 in words is "six hundred ninety million, eighty thousand, four hundred forty-one".