247339749 has 16 divisors (see below), whose sum is σ = 349852608. Its totient is φ = 154897152.

The previous prime is 247339733. The next prime is 247339787. The reversal of 247339749 is 947933742.

It is not a de Polignac number, because 247339749 - 2⁴ = 247339733 is a prime.

It is a super-2 number, since 2×247339749² = 122353902870766002, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 247339698 and 247339707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247339349) 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 15 ways as a sum of consecutive naturals, for example, 24054 + ... + 32760.

It is an arithmetic number, because the mean of its divisors is an integer number (21865788).

Almost surely, 2^247339749 is an apocalyptic number.

It is an amenable number.

247339749 is a deficient number, since it is larger than the sum of its proper divisors (102512859).

247339749 is a wasteful number, since it uses less digits than its factorization.

247339749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9284.

The product of its digits is 1143072, while the sum is 48.

The square root of 247339749 is about 15727.0387867519. The cubic root of 247339749 is about 627.7180812656.

The spelling of 247339749 in words is "two hundred forty-seven million, three hundred thirty-nine thousand, seven hundred forty-nine".