245638279 has 4 divisors (see below), whose sum is σ = 245923776. Its totient is φ = 245352784.

The previous prime is 245638273. The next prime is 245638297. The reversal of 245638279 is 972836542.

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

It is a cyclic number.

It is not a de Polignac number, because 245638279 - 2⁵ = 245638247 is a prime.

It is a super-2 number, since 2×245638279² = 120676328220163682, 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 (245638273) 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, 141454 + ... + 143179.

It is an arithmetic number, because the mean of its divisors is an integer number (61480944).

Almost surely, 2^245638279 is an apocalyptic number.

245638279 is a deficient number, since it is larger than the sum of its proper divisors (285497).

245638279 is an equidigital number, since it uses as much as digits as its factorization.

245638279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285496.

The product of its digits is 725760, while the sum is 46.

The square root of 245638279 is about 15672.8516550116. The cubic root of 245638279 is about 626.2753937031.

The spelling of 245638279 in words is "two hundred forty-five million, six hundred thirty-eight thousand, two hundred seventy-nine".