247387439 has 12 divisors (see below), whose sum is σ = 275128056. Its totient is φ = 222180192.

The previous prime is 247387433. The next prime is 247387453. The reversal of 247387439 is 934783742.

It is not a de Polignac number, because 247387439 - 2⁸ = 247387183 is a prime.

It is a super-2 number, since 2×247387439² = 122401089949957442, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 247387393 and 247387402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247387433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13529 + ... + 26034.

It is an arithmetic number, because the mean of its divisors is an integer number (22927338).

Almost surely, 2^247387439 is an apocalyptic number.

247387439 is a deficient number, since it is larger than the sum of its proper divisors (27740617).

247387439 is a wasteful number, since it uses less digits than its factorization.

247387439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39626 (or 39613 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 47.

The square root of 247387439 is about 15728.5548922970. The cubic root of 247387439 is about 627.7584224719.

The spelling of 247387439 in words is "two hundred forty-seven million, three hundred eighty-seven thousand, four hundred thirty-nine".