245147839 has 4 divisors (see below), whose sum is σ = 246517560. Its totient is φ = 243778120.

The previous prime is 245147831. The next prime is 245147873. The reversal of 245147839 is 938741542.

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 245147839 - 2³ = 245147831 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 245147795 and 245147804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245147831) 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 3 ways as a sum of consecutive naturals, for example, 684592 + ... + 684949.

It is an arithmetic number, because the mean of its divisors is an integer number (61629390).

Almost surely, 2^245147839 is an apocalyptic number.

245147839 is a deficient number, since it is larger than the sum of its proper divisors (1369721).

245147839 is a wasteful number, since it uses less digits than its factorization.

245147839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1369720.

The product of its digits is 241920, while the sum is 43.

The square root of 245147839 is about 15657.1976739134. The cubic root of 245147839 is about 625.8583100267.

The spelling of 245147839 in words is "two hundred forty-five million, one hundred forty-seven thousand, eight hundred thirty-nine".