247101839 has 2 divisors, whose sum is σ = 247101840. Its totient is φ = 247101838.

The previous prime is 247101737. The next prime is 247101893. The reversal of 247101839 is 938101742.

Together with next prime (247101893) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-247101839 is a prime.

It is a super-2 number, since 2×247101839² = 122118637674363842, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 247101799 and 247101808.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247161839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123550919 + 123550920.

It is an arithmetic number, because the mean of its divisors is an integer number (123550920).

Almost surely, 2^247101839 is an apocalyptic number.

247101839 is a deficient number, since it is larger than the sum of its proper divisors (1).

247101839 is an equidigital number, since it uses as much as digits as its factorization.

247101839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 247101839 is about 15719.4732418106. The cubic root of 247101839 is about 627.5167545248.

The spelling of 247101839 in words is "two hundred forty-seven million, one hundred one thousand, eight hundred thirty-nine".