247613 has 2 divisors, whose sum is σ = 247614. Its totient is φ = 247612.

The previous prime is 247609. The next prime is 247633. The reversal of 247613 is 316742.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 190969 + 56644 = 437^2 + 238^2 .

It is a cyclic number.

It is not a de Polignac number, because 247613 - 2² = 247609 is a prime.

It is a super-2 number, since 2×247613² = 122624395538, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123806 + 123807.

It is an arithmetic number, because the mean of its divisors is an integer number (123807).

2²⁴⁷⁶¹³ is an apocalyptic number.

It is an amenable number.

247613 is a deficient number, since it is larger than the sum of its proper divisors (1).

247613 is an equidigital number, since it uses as much as digits as its factorization.

247613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 23.

The square root of 247613 is about 497.6072748664. The cubic root of 247613 is about 62.7949155417.

The spelling of 247613 in words is "two hundred forty-seven thousand, six hundred thirteen".