247711479049 has 4 divisors (see below), whose sum is σ = 249661963264. Its totient is φ = 245760994836.

The previous prime is 247711479013. The next prime is 247711479083. The reversal of 247711479049 is 940974117742.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 940974117742 = 2 ⋅470487058871.

It is a cyclic number.

It is not a de Polignac number, because 247711479049 - 2¹⁷ = 247711347977 is a prime.

It is a super-2 number, since 2×247711479049² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247711479749) 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, 975241917 + ... + 975242170.

It is an arithmetic number, because the mean of its divisors is an integer number (62415490816).

Almost surely, 2^247711479049 is an apocalyptic number.

It is an amenable number.

247711479049 is a deficient number, since it is larger than the sum of its proper divisors (1950484215).

247711479049 is a wasteful number, since it uses less digits than its factorization.

247711479049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1950484214.

The product of its (nonzero) digits is 3556224, while the sum is 55.

The spelling of 247711479049 in words is "two hundred forty-seven billion, seven hundred eleven million, four hundred seventy-nine thousand, forty-nine".