245813669 has 4 divisors (see below), whose sum is σ = 245846220. Its totient is φ = 245781120.

The previous prime is 245813653. The next prime is 245813677. The reversal of 245813669 is 966318542.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 59136100 + 186677569 = 7690^2 + 13663^2 .

It is a cyclic number.

It is not a de Polignac number, because 245813669 - 2⁴ = 245813653 is a prime.

It is a super-2 number, since 2×245813669² = 120848719734483122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245813609) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1589 + ... + 22229.

It is an arithmetic number, because the mean of its divisors is an integer number (61461555).

Almost surely, 2^245813669 is an apocalyptic number.

It is an amenable number.

245813669 is a deficient number, since it is larger than the sum of its proper divisors (32551).

245813669 is a wasteful number, since it uses less digits than its factorization.

245813669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32550.

The product of its digits is 311040, while the sum is 44.

The square root of 245813669 is about 15678.4460008000. The cubic root of 245813669 is about 626.4244154123.

The spelling of 245813669 in words is "two hundred forty-five million, eight hundred thirteen thousand, six hundred sixty-nine".