247490239 has 2 divisors, whose sum is σ = 247490240. Its totient is φ = 247490238.

The previous prime is 247490179. The next prime is 247490249. The reversal of 247490239 is 932094742.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 247490239 - 2⁹ = 247489727 is a prime.

It is a super-2 number, since 2×247490239² = 122502836800554242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247490249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123745119 + 123745120.

It is an arithmetic number, because the mean of its divisors is an integer number (123745120).

Almost surely, 2^247490239 is an apocalyptic number.

247490239 is a deficient number, since it is larger than the sum of its proper divisors (1).

247490239 is an equidigital number, since it uses as much as digits as its factorization.

247490239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 247490239 is about 15731.8224945491. The cubic root of 247490239 is about 627.8453638694.

The spelling of 247490239 in words is "two hundred forty-seven million, four hundred ninety thousand, two hundred thirty-nine".