245517089 has 4 divisors (see below), whose sum is σ = 252152724. Its totient is φ = 238881456.

The previous prime is 245517073. The next prime is 245517101. The reversal of 245517089 is 980715542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 184552225 + 60964864 = 13585^2 + 7808^2 .

It is a cyclic number.

It is not a de Polignac number, because 245517089 - 2⁴ = 245517073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245517059) 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, 3317762 + ... + 3317835.

It is an arithmetic number, because the mean of its divisors is an integer number (63038181).

Almost surely, 2^245517089 is an apocalyptic number.

It is an amenable number.

245517089 is a deficient number, since it is larger than the sum of its proper divisors (6635635).

245517089 is an equidigital number, since it uses as much as digits as its factorization.

245517089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6635634.

The product of its (nonzero) digits is 100800, while the sum is 41.

The square root of 245517089 is about 15668.9849384062. The cubic root of 245517089 is about 626.1723820707.

The spelling of 245517089 in words is "two hundred forty-five million, five hundred seventeen thousand, eighty-nine".