690844201 has 2 divisors, whose sum is σ = 690844202. Its totient is φ = 690844200.

The previous prime is 690844183. The next prime is 690844213. The reversal of 690844201 is 102448096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 690428176 + 416025 = 26276^2 + 645^2 .

It is a cyclic number.

It is not a de Polignac number, because 690844201 - 2²¹ = 688747049 is a prime.

It is not a weakly prime, because it can be changed into another prime (690844291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345422100 + 345422101.

It is an arithmetic number, because the mean of its divisors is an integer number (345422101).

Almost surely, 2^690844201 is an apocalyptic number.

It is an amenable number.

690844201 is a deficient number, since it is larger than the sum of its proper divisors (1).

690844201 is an equidigital number, since it uses as much as digits as its factorization.

690844201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 690844201 is about 26283.9152524885. The cubic root of 690844201 is about 884.0158235976.

The spelling of 690844201 in words is "six hundred ninety million, eight hundred forty-four thousand, two hundred one".