690271441 has 2 divisors, whose sum is σ = 690271442. Its totient is φ = 690271440.

The previous prime is 690271433. The next prime is 690271457. The reversal of 690271441 is 144172096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 589469841 + 100801600 = 24279^2 + 10040^2 .

It is a cyclic number.

It is not a de Polignac number, because 690271441 - 2³ = 690271433 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 690271397 and 690271406.

It is not a weakly prime, because it can be changed into another prime (690271411) 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 as a sum of consecutive naturals, namely, 345135720 + 345135721.

It is an arithmetic number, because the mean of its divisors is an integer number (345135721).

Almost surely, 2^690271441 is an apocalyptic number.

It is an amenable number.

690271441 is a deficient number, since it is larger than the sum of its proper divisors (1).

690271441 is an equidigital number, since it uses as much as digits as its factorization.

690271441 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 690271441 is about 26273.0173562155. The cubic root of 690271441 is about 883.7714516178.

The spelling of 690271441 in words is "six hundred ninety million, two hundred seventy-one thousand, four hundred forty-one".