247474747 has 4 divisors (see below), whose sum is σ = 266511280. Its totient is φ = 228438216.

The previous prime is 247474739. The next prime is 247474769. The reversal of 247474747 is 747474742.

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 247474747 - 2³ = 247474739 is a prime.

It is a super-2 number, since 2×247474747² = 122487500805428018, 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 = 247474697 and 247474706.

It is not an unprimeable number, because it can be changed into a prime (247474247) 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 3 ways as a sum of consecutive naturals, for example, 9518247 + ... + 9518272.

It is an arithmetic number, because the mean of its divisors is an integer number (66627820).

Almost surely, 2^247474747 is an apocalyptic number.

247474747 is a deficient number, since it is larger than the sum of its proper divisors (19036533).

247474747 is a wasteful number, since it uses less digits than its factorization.

247474747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19036532.

The product of its digits is 1229312, while the sum is 46.

The square root of 247474747 is about 15731.3301090531. The cubic root of 247474747 is about 627.8322633079.

The spelling of 247474747 in words is "two hundred forty-seven million, four hundred seventy-four thousand, seven hundred forty-seven".