690947207 has 2 divisors, whose sum is σ = 690947208. Its totient is φ = 690947206.

The previous prime is 690947197. The next prime is 690947227. The reversal of 690947207 is 702749096.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 690947207 - 2¹⁶ = 690881671 is a prime.

It is a super-2 number, since 2×690947207² = 954816085722201698, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (690947227) 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, 345473603 + 345473604.

It is an arithmetic number, because the mean of its divisors is an integer number (345473604).

Almost surely, 2^690947207 is an apocalyptic number.

690947207 is a deficient number, since it is larger than the sum of its proper divisors (1).

690947207 is an equidigital number, since it uses as much as digits as its factorization.

690947207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 190512, while the sum is 44.

The square root of 690947207 is about 26285.8746668244. The cubic root of 690947207 is about 884.0597574824.

The spelling of 690947207 in words is "six hundred ninety million, nine hundred forty-seven thousand, two hundred seven".