245564869 has 4 divisors (see below), whose sum is σ = 267888960. Its totient is φ = 223240780.

The previous prime is 245564861. The next prime is 245564887. The reversal of 245564869 is 968465542.

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 245564869 - 2³ = 245564861 is a prime.

It is a super-2 number, since 2×245564869² = 120604209773974322, 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 (245564861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11162029 + ... + 11162050.

It is an arithmetic number, because the mean of its divisors is an integer number (66972240).

Almost surely, 2^245564869 is an apocalyptic number.

It is an amenable number.

245564869 is a deficient number, since it is larger than the sum of its proper divisors (22324091).

245564869 is a wasteful number, since it uses less digits than its factorization.

245564869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22324090.

The product of its digits is 2073600, while the sum is 49.

The square root of 245564869 is about 15670.5095322392. The cubic root of 245564869 is about 626.2129991698.

The spelling of 245564869 in words is "two hundred forty-five million, five hundred sixty-four thousand, eight hundred sixty-nine".