247400173 has 2 divisors, whose sum is σ = 247400174. Its totient is φ = 247400172.

The previous prime is 247400171. The next prime is 247400221. The reversal of 247400173 is 371004742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 174160809 + 73239364 = 13197^2 + 8558^2 .

It is a cyclic number.

It is not a de Polignac number, because 247400173 - 2¹ = 247400171 is a prime.

It is a super-2 number, since 2×247400173² = 122413691200859858, which contains 22 as substring.

Together with 247400171, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247400171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123700086 + 123700087.

It is an arithmetic number, because the mean of its divisors is an integer number (123700087).

Almost surely, 2^247400173 is an apocalyptic number.

It is an amenable number.

247400173 is a deficient number, since it is larger than the sum of its proper divisors (1).

247400173 is an equidigital number, since it uses as much as digits as its factorization.

247400173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 247400173 is about 15728.9596922365. The cubic root of 247400173 is about 627.7691933483.

The spelling of 247400173 in words is "two hundred forty-seven million, four hundred thousand, one hundred seventy-three".