690853417 has 2 divisors, whose sum is σ = 690853418. Its totient is φ = 690853416.

The previous prime is 690853391. The next prime is 690853421. The reversal of 690853417 is 714358096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 690848656 + 4761 = 26284^2 + 69^2 .

It is a cyclic number.

It is not a de Polignac number, because 690853417 - 2¹⁵ = 690820649 is a prime.

It is not a weakly prime, because it can be changed into another prime (690853717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345426708 + 345426709.

It is an arithmetic number, because the mean of its divisors is an integer number (345426709).

Almost surely, 2^690853417 is an apocalyptic number.

It is an amenable number.

690853417 is a deficient number, since it is larger than the sum of its proper divisors (1).

690853417 is an equidigital number, since it uses as much as digits as its factorization.

690853417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 690853417 is about 26284.0905682506. The cubic root of 690853417 is about 884.0197545629.

The spelling of 690853417 in words is "six hundred ninety million, eight hundred fifty-three thousand, four hundred seventeen".