690945341 has 2 divisors, whose sum is σ = 690945342. Its totient is φ = 690945340.

The previous prime is 690945319. The next prime is 690945403. The reversal of 690945341 is 143549096.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 486026116 + 204919225 = 22046^2 + 14315^2 .

It is a cyclic number.

It is not a de Polignac number, because 690945341 - 2¹⁸ = 690683197 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690545341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345472670 + 345472671.

It is an arithmetic number, because the mean of its divisors is an integer number (345472671).

Almost surely, 2^690945341 is an apocalyptic number.

It is an amenable number.

690945341 is a deficient number, since it is larger than the sum of its proper divisors (1).

690945341 is an equidigital number, since it uses as much as digits as its factorization.

690945341 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 690945341 is about 26285.8391724518. The cubic root of 690945341 is about 884.0589616392.

The spelling of 690945341 in words is "six hundred ninety million, nine hundred forty-five thousand, three hundred forty-one".