245369639 has 4 divisors (see below), whose sum is σ = 245841120. Its totient is φ = 244898160.

The previous prime is 245369623. The next prime is 245369689. The reversal of 245369639 is 936963542.

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 245369639 - 2⁴ = 245369623 is a prime.

It is a super-3 number, since 3×245369639³ (a number of 26 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245369593 and 245369602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245369689) 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, 234959 + ... + 236000.

It is an arithmetic number, because the mean of its divisors is an integer number (61460280).

Almost surely, 2^245369639 is an apocalyptic number.

245369639 is a deficient number, since it is larger than the sum of its proper divisors (471481).

245369639 is an equidigital number, since it uses as much as digits as its factorization.

245369639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471480.

The product of its digits is 1049760, while the sum is 47.

The square root of 245369639 is about 15664.2790769317. The cubic root of 245369639 is about 626.0470036872.

The spelling of 245369639 in words is "two hundred forty-five million, three hundred sixty-nine thousand, six hundred thirty-nine".