245491839 has 12 divisors (see below), whose sum is σ = 358872696. Its totient is φ = 161688912.

The previous prime is 245491823. The next prime is 245491843. The reversal of 245491839 is 938194542.

245491839 is a `hidden beast` number, since 24 + 549 + 1 + 83 + 9 = 666.

It is not a de Polignac number, because 245491839 - 2⁴ = 245491823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 245491794 and 245491803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245491879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 163572 + ... + 165065.

It is an arithmetic number, because the mean of its divisors is an integer number (29906058).

Almost surely, 2^245491839 is an apocalyptic number.

245491839 is a deficient number, since it is larger than the sum of its proper divisors (113380857).

245491839 is a wasteful number, since it uses less digits than its factorization.

245491839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328726 (or 328723 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 245491839 is about 15668.1791858531. The cubic root of 245491839 is about 626.1509152762.

The spelling of 245491839 in words is "two hundred forty-five million, four hundred ninety-one thousand, eight hundred thirty-nine".