247123417 has 4 divisors (see below), whose sum is σ = 247155876. Its totient is φ = 247090960.

The previous prime is 247123391. The next prime is 247123421. The reversal of 247123417 is 714321742.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 68740681 + 178382736 = 8291^2 + 13356^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247123417 is a prime.

It is a super-2 number, since 2×247123417² = 122139966459511778, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (247123517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2067 + ... + 22327.

It is an arithmetic number, because the mean of its divisors is an integer number (61788969).

Almost surely, 2^247123417 is an apocalyptic number.

It is an amenable number.

247123417 is a deficient number, since it is larger than the sum of its proper divisors (32459).

247123417 is a wasteful number, since it uses less digits than its factorization.

247123417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32458.

The product of its digits is 9408, while the sum is 31.

The square root of 247123417 is about 15720.1595729814. The cubic root of 247123417 is about 627.5350198177.

The spelling of 247123417 in words is "two hundred forty-seven million, one hundred twenty-three thousand, four hundred seventeen".