259213993 has 2 divisors, whose sum is σ = 259213994. Its totient is φ = 259213992.

The previous prime is 259213991. The next prime is 259214003. The reversal of 259213993 is 399312952.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129891609 + 129322384 = 11397^2 + 11372^2 .

It is a cyclic number.

It is not a de Polignac number, because 259213993 - 2¹ = 259213991 is a prime.

Together with 259213991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (259213991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 129606996 + 129606997.

It is an arithmetic number, because the mean of its divisors is an integer number (129606997).

Almost surely, 2^259213993 is an apocalyptic number.

It is an amenable number.

259213993 is a deficient number, since it is larger than the sum of its proper divisors (1).

259213993 is an equidigital number, since it uses as much as digits as its factorization.

259213993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 131220, while the sum is 43.

The square root of 259213993 is about 16100.1240057336. The cubic root of 259213993 is about 637.6066148998.

The spelling of 259213993 in words is "two hundred fifty-nine million, two hundred thirteen thousand, nine hundred ninety-three".