690352447 has 2 divisors, whose sum is σ = 690352448. Its totient is φ = 690352446.

The previous prime is 690352387. The next prime is 690352457. The reversal of 690352447 is 744253096.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690352447 - 2⁷ = 690352319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690352457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345176223 + 345176224.

It is an arithmetic number, because the mean of its divisors is an integer number (345176224).

Almost surely, 2^690352447 is an apocalyptic number.

690352447 is a deficient number, since it is larger than the sum of its proper divisors (1).

690352447 is an equidigital number, since it uses as much as digits as its factorization.

690352447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 40.

The square root of 690352447 is about 26274.5589306462. The cubic root of 690352447 is about 883.8060215883.

The spelling of 690352447 in words is "six hundred ninety million, three hundred fifty-two thousand, four hundred forty-seven".