245008813 has 4 divisors (see below), whose sum is σ = 280010080. Its totient is φ = 210007548.

The previous prime is 245008807. The next prime is 245008823. The reversal of 245008813 is 318800542.

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 a de Polignac number, because none of the positive numbers 2^k-245008813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245008823) 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, 17500623 + ... + 17500636.

It is an arithmetic number, because the mean of its divisors is an integer number (70002520).

Almost surely, 2^245008813 is an apocalyptic number.

It is an amenable number.

245008813 is a deficient number, since it is larger than the sum of its proper divisors (35001267).

245008813 is an equidigital number, since it uses as much as digits as its factorization.

245008813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35001266.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 245008813 is about 15652.7573609253. The cubic root of 245008813 is about 625.7399773080.

The spelling of 245008813 in words is "two hundred forty-five million, eight thousand, eight hundred thirteen".