247713047 has 2 divisors, whose sum is σ = 247713048. Its totient is φ = 247713046.

The previous prime is 247713031. The next prime is 247713079. The reversal of 247713047 is 740317742.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247713047 - 2⁴ = 247713031 is a prime.

It is a super-2 number, since 2×247713047² = 122723507308048418, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 247712998 and 247713016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247713007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123856523 + 123856524.

It is an arithmetic number, because the mean of its divisors is an integer number (123856524).

Almost surely, 2^247713047 is an apocalyptic number.

247713047 is a deficient number, since it is larger than the sum of its proper divisors (1).

247713047 is an equidigital number, since it uses as much as digits as its factorization.

247713047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32928, while the sum is 35.

The square root of 247713047 is about 15738.9023441916. The cubic root of 247713047 is about 628.0337174413.

The spelling of 247713047 in words is "two hundred forty-seven million, seven hundred thirteen thousand, forty-seven".