245369917 has 6 divisors (see below), whose sum is σ = 265696602. Its totient is φ = 226495152.

The previous prime is 245369909. The next prime is 245369963. The reversal of 245369917 is 719963542.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 7778521 + 237591396 = 2789^2 + 15414^2 .

It is not a de Polignac number, because 245369917 - 2³ = 245369909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245369617) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 725778 + ... + 726115.

It is an arithmetic number, because the mean of its divisors is an integer number (44282767).

Almost surely, 2^245369917 is an apocalyptic number.

It is an amenable number.

245369917 is a deficient number, since it is larger than the sum of its proper divisors (20326685).

245369917 is a wasteful number, since it uses less digits than its factorization.

245369917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451919 (or 1451906 counting only the distinct ones).

The product of its digits is 408240, while the sum is 46.

The square root of 245369917 is about 15664.2879506219. The cubic root of 245369917 is about 626.0472401209.

It can be divided in two parts, 24536 and 9917, that added together give a triangular number (34453 = T₂₆₂).

The spelling of 245369917 in words is "two hundred forty-five million, three hundred sixty-nine thousand, nine hundred seventeen".