247123871 has 8 divisors (see below), whose sum is σ = 253668288. Its totient is φ = 240660000.

The previous prime is 247123867. The next prime is 247123879. The reversal of 247123871 is 178321742.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 247123871 - 2² = 247123867 is a prime.

It is a super-2 number, since 2×247123871² = 122140415236049282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (247123879) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13895 + ... + 26216.

It is an arithmetic number, because the mean of its divisors is an integer number (31708536).

Almost surely, 2^247123871 is an apocalyptic number.

247123871 is a deficient number, since it is larger than the sum of its proper divisors (6544417).

247123871 is a wasteful number, since it uses less digits than its factorization.

247123871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40273.

The product of its digits is 18816, while the sum is 35.

The square root of 247123871 is about 15720.1740130318. The cubic root of 247123871 is about 627.5354041071.

The spelling of 247123871 in words is "two hundred forty-seven million, one hundred twenty-three thousand, eight hundred seventy-one".