245443039 has 4 divisors (see below), whose sum is σ = 247694920. Its totient is φ = 243191160.

The previous prime is 245443031. The next prime is 245443049. The reversal of 245443039 is 930344542.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 930344542 = 2 ⋅465172271.

It is a cyclic number.

It is not a de Polignac number, because 245443039 - 2³ = 245443031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245442995 and 245443013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245443031) 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, 1125777 + ... + 1125994.

It is an arithmetic number, because the mean of its divisors is an integer number (61923730).

Almost surely, 2^245443039 is an apocalyptic number.

245443039 is a deficient number, since it is larger than the sum of its proper divisors (2251881).

245443039 is a wasteful number, since it uses less digits than its factorization.

245443039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2251880.

The product of its (nonzero) digits is 51840, while the sum is 34.

The square root of 245443039 is about 15666.6218119925. The cubic root of 245443039 is about 626.1094228044.

The spelling of 245443039 in words is "two hundred forty-five million, four hundred forty-three thousand, thirty-nine".