259971947 has 2 divisors, whose sum is σ = 259971948. Its totient is φ = 259971946.

The previous prime is 259971941. The next prime is 259972039. The reversal of 259971947 is 749179952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 259971947 - 2⁶ = 259971883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (259971941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129985973 + 129985974.

It is an arithmetic number, because the mean of its divisors is an integer number (129985974).

Almost surely, 2^259971947 is an apocalyptic number.

259971947 is a deficient number, since it is larger than the sum of its proper divisors (1).

259971947 is an equidigital number, since it uses as much as digits as its factorization.

259971947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1428840, while the sum is 53.

The square root of 259971947 is about 16123.6455865291. The cubic root of 259971947 is about 638.2274741382.

The spelling of 259971947 in words is "two hundred fifty-nine million, nine hundred seventy-one thousand, nine hundred forty-seven".