247740473 has 16 divisors (see below), whose sum is σ = 267811200. Its totient is φ = 228324096.

The previous prime is 247740463. The next prime is 247740481. The reversal of 247740473 is 374047742.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 247740473 - 2⁴ = 247740457 is a prime.

It is a super-2 number, since 2×247740473² = 122750683924527458, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247740413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 226115 + ... + 227207.

It is an arithmetic number, because the mean of its divisors is an integer number (16738200).

Almost surely, 2^247740473 is an apocalyptic number.

It is an amenable number.

247740473 is a deficient number, since it is larger than the sum of its proper divisors (20070727).

247740473 is a wasteful number, since it uses less digits than its factorization.

247740473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1376.

The product of its (nonzero) digits is 131712, while the sum is 38.

The square root of 247740473 is about 15739.7736006589. The cubic root of 247740473 is about 628.0568945506.

The spelling of 247740473 in words is "two hundred forty-seven million, seven hundred forty thousand, four hundred seventy-three".