247123873 has 4 divisors (see below), whose sum is σ = 247198000. Its totient is φ = 247049748.

The previous prime is 247123867. The next prime is 247123879. The reversal of 247123873 is 378321742.

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.

It is an interprime number because it is at equal distance from previous prime (247123867) and next prime (247123879).

It is a cyclic number.

It is not a de Polignac number, because 247123873 - 2²⁵ = 213569441 is a prime.

It is a super-2 number, since 2×247123873² = 122140417213040258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247123879) 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, 31815 + ... + 38812.

It is an arithmetic number, because the mean of its divisors is an integer number (61799500).

Almost surely, 2^247123873 is an apocalyptic number.

It is an amenable number.

247123873 is a deficient number, since it is larger than the sum of its proper divisors (74127).

247123873 is an equidigital number, since it uses as much as digits as its factorization.

247123873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74126.

The product of its digits is 56448, while the sum is 37.

The square root of 247123873 is about 15720.1740766443. The cubic root of 247123873 is about 627.5354058000.

The spelling of 247123873 in words is "two hundred forty-seven million, one hundred twenty-three thousand, eight hundred seventy-three".