245537839 has 4 divisors (see below), whose sum is σ = 247330224. Its totient is φ = 243745456.

The previous prime is 245537827. The next prime is 245537843. The reversal of 245537839 is 938735542.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245537839 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245537879) 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, 895987 + ... + 896260.

It is an arithmetic number, because the mean of its divisors is an integer number (61832556).

Almost surely, 2^245537839 is an apocalyptic number.

245537839 is a deficient number, since it is larger than the sum of its proper divisors (1792385).

245537839 is a wasteful number, since it uses less digits than its factorization.

245537839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1792384.

The product of its digits is 907200, while the sum is 46.

The square root of 245537839 is about 15669.6470604797. The cubic root of 245537839 is about 626.1900219981.

The spelling of 245537839 in words is "two hundred forty-five million, five hundred thirty-seven thousand, eight hundred thirty-nine".