247026431 has 2 divisors, whose sum is σ = 247026432. Its totient is φ = 247026430.

The previous prime is 247026421. The next prime is 247026449. The reversal of 247026431 is 134620742.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 247026431 - 2¹⁰ = 247025407 is a prime.

It is a super-2 number, since 2×247026431² = 122044115225195522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 247026394 and 247026403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247026401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123513215 + 123513216.

It is an arithmetic number, because the mean of its divisors is an integer number (123513216).

Almost surely, 2^247026431 is an apocalyptic number.

247026431 is a deficient number, since it is larger than the sum of its proper divisors (1).

247026431 is an equidigital number, since it uses as much as digits as its factorization.

247026431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 247026431 is about 15717.0745051361. The cubic root of 247026431 is about 627.4529149921.

The spelling of 247026431 in words is "two hundred forty-seven million, twenty-six thousand, four hundred thirty-one".