239981473 has 2 divisors, whose sum is σ = 239981474. Its totient is φ = 239981472.

The previous prime is 239981461. The next prime is 239981479. The reversal of 239981473 is 374189932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138133009 + 101848464 = 11753^2 + 10092^2 .

It is a cyclic number.

It is not a de Polignac number, because 239981473 - 2²¹ = 237884321 is a prime.

It is a super-2 number, since 2×239981473² = 115182214766499458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (239981479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119990736 + 119990737.

It is an arithmetic number, because the mean of its divisors is an integer number (119990737).

Almost surely, 2^239981473 is an apocalyptic number.

It is an amenable number.

239981473 is a deficient number, since it is larger than the sum of its proper divisors (1).

239981473 is an equidigital number, since it uses as much as digits as its factorization.

239981473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 239981473 is about 15491.3354169355. The cubic root of 239981473 is about 621.4305097524.

The spelling of 239981473 in words is "two hundred thirty-nine million, nine hundred eighty-one thousand, four hundred seventy-three".