690045269 has 4 divisors (see below), whose sum is σ = 693085344. Its totient is φ = 687005196.

The previous prime is 690045253. The next prime is 690045277. The reversal of 690045269 is 962540096.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 690045269 - 2⁴ = 690045253 is a prime.

It is a super-2 number, since 2×690045269² = 952324946538564722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (690045469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1519697 + ... + 1520150.

It is an arithmetic number, because the mean of its divisors is an integer number (173271336).

Almost surely, 2^690045269 is an apocalyptic number.

It is an amenable number.

690045269 is a deficient number, since it is larger than the sum of its proper divisors (3040075).

690045269 is a wasteful number, since it uses less digits than its factorization.

690045269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3040074.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 690045269 is about 26268.7127396833. The cubic root of 690045269 is about 883.6749165545.

The spelling of 690045269 in words is "six hundred ninety million, forty-five thousand, two hundred sixty-nine".