245972919 has 4 divisors (see below), whose sum is σ = 327963896. Its totient is φ = 163981944.

The previous prime is 245972893. The next prime is 245972921. The reversal of 245972919 is 919279542.

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

It is not a de Polignac number, because 245972919 - 2¹¹ = 245970871 is a prime.

It is a super-2 number, since 2×245972919² = 121005353762761122, 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 (245972959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40995484 + ... + 40995489.

It is an arithmetic number, because the mean of its divisors is an integer number (81990974).

Almost surely, 2^245972919 is an apocalyptic number.

245972919 is a deficient number, since it is larger than the sum of its proper divisors (81990977).

245972919 is an equidigital number, since it uses as much as digits as its factorization.

245972919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81990976.

The product of its digits is 408240, while the sum is 48.

The square root of 245972919 is about 15683.5238068490. The cubic root of 245972919 is about 626.5596622351.

The spelling of 245972919 in words is "two hundred forty-five million, nine hundred seventy-two thousand, nine hundred nineteen".