247351273 has 6 divisors (see below), whose sum is σ = 267842094. Its totient is φ = 228324096.

The previous prime is 247351267. The next prime is 247351277. The reversal of 247351273 is 372153742.

It can be written as a sum of positive squares in 3 ways, for example, as 30437289 + 216913984 = 5517^2 + 14728^2 .

It is a de Polignac number, because none of the positive numbers 2^k-247351273 is a prime.

It is a super-2 number, since 2×247351273² = 122365304509441058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (247351277) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 731640 + ... + 731977.

It is an arithmetic number, because the mean of its divisors is an integer number (44640349).

Almost surely, 2^247351273 is an apocalyptic number.

It is an amenable number.

247351273 is a deficient number, since it is larger than the sum of its proper divisors (20490821).

247351273 is a wasteful number, since it uses less digits than its factorization.

247351273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1463643 (or 1463630 counting only the distinct ones).

The product of its digits is 35280, while the sum is 34.

The square root of 247351273 is about 15727.4051578765. The cubic root of 247351273 is about 627.7278299491.

The spelling of 247351273 in words is "two hundred forty-seven million, three hundred fifty-one thousand, two hundred seventy-three".