247470389 has 2 divisors, whose sum is σ = 247470390. Its totient is φ = 247470388.

The previous prime is 247470373. The next prime is 247470401. The reversal of 247470389 is 983074742.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 229280164 + 18190225 = 15142^2 + 4265^2 .

It is a cyclic number.

It is not a de Polignac number, because 247470389 - 2⁴ = 247470373 is a prime.

It is a super-2 number, since 2×247470389² = 122483186863622642, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (247470359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123735194 + 123735195.

It is an arithmetic number, because the mean of its divisors is an integer number (123735195).

Almost surely, 2^247470389 is an apocalyptic number.

It is an amenable number.

247470389 is a deficient number, since it is larger than the sum of its proper divisors (1).

247470389 is an equidigital number, since it uses as much as digits as its factorization.

247470389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 338688, while the sum is 44.

The square root of 247470389 is about 15731.1915950445. The cubic root of 247470389 is about 627.8285779365.

The spelling of 247470389 in words is "two hundred forty-seven million, four hundred seventy thousand, three hundred eighty-nine".