247899089 has 2 divisors, whose sum is σ = 247899090. Its totient is φ = 247899088.

The previous prime is 247899017. The next prime is 247899097. The reversal of 247899089 is 980998742.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178676689 + 69222400 = 13367^2 + 8320^2 .

It is a cyclic number.

It is not a de Polignac number, because 247899089 - 2²⁴ = 231121873 is a prime.

It is a super-2 number, since 2×247899089² = 122907916654059842, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (247899989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123949544 + 123949545.

It is an arithmetic number, because the mean of its divisors is an integer number (123949545).

Almost surely, 2^247899089 is an apocalyptic number.

It is an amenable number.

247899089 is a deficient number, since it is larger than the sum of its proper divisors (1).

247899089 is an equidigital number, since it uses as much as digits as its factorization.

247899089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2612736, while the sum is 56.

The square root of 247899089 is about 15744.8114945845. The cubic root of 247899089 is about 628.1909039008.

The spelling of 247899089 in words is "two hundred forty-seven million, eight hundred ninety-nine thousand, eighty-nine".