245695969 has 4 divisors (see below), whose sum is σ = 250331796. Its totient is φ = 241060144.

The previous prime is 245695963. The next prime is 245695979. The reversal of 245695969 is 969596542.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 969596542 = 2 ⋅484798271.

It can be written as a sum of positive squares in 2 ways, for example, as 146095569 + 99600400 = 12087^2 + 9980^2 .

It is a cyclic number.

It is not a de Polignac number, because 245695969 - 2⁷ = 245695841 is a prime.

It is a super-2 number, since 2×245695969² = 120733018365697922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245695963) 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, 2317834 + ... + 2317939.

It is an arithmetic number, because the mean of its divisors is an integer number (62582949).

Almost surely, 2^245695969 is an apocalyptic number.

It is an amenable number.

245695969 is a deficient number, since it is larger than the sum of its proper divisors (4635827).

245695969 is an equidigital number, since it uses as much as digits as its factorization.

245695969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4635826.

The product of its digits is 5248800, while the sum is 55.

The square root of 245695969 is about 15674.6919905943. The cubic root of 245695969 is about 626.3244183632.

The spelling of 245695969 in words is "two hundred forty-five million, six hundred ninety-five thousand, nine hundred sixty-nine".