690261273 has 12 divisors (see below), whose sum is σ = 1073739940. Its totient is φ = 424776096.

The previous prime is 690261259. The next prime is 690261311. The reversal of 690261273 is 372162096.

It can be written as a sum of positive squares in 2 ways, for example, as 440874009 + 249387264 = 20997^2 + 15792^2 .

It is not a de Polignac number, because 690261273 - 2⁸ = 690261017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (690266273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2949718 + ... + 2949951.

Almost surely, 2^690261273 is an apocalyptic number.

It is an amenable number.

690261273 is a deficient number, since it is larger than the sum of its proper divisors (383478667).

690261273 is a wasteful number, since it uses less digits than its factorization.

690261273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5899688 (or 5899685 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 690261273 is about 26272.8238489889. The cubic root of 690261273 is about 883.7671121500.

The spelling of 690261273 in words is "six hundred ninety million, two hundred sixty-one thousand, two hundred seventy-three".