265193993 has 2 divisors, whose sum is σ = 265193994. Its totient is φ = 265193992.

The previous prime is 265193989. The next prime is 265194019. The reversal of 265193993 is 399391562.

265193993 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 240622144 + 24571849 = 15512^2 + 4957^2 .

It is a cyclic number.

It is not a de Polignac number, because 265193993 - 2² = 265193989 is a prime.

It is not a weakly prime, because it can be changed into another prime (265193953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132596996 + 132596997.

It is an arithmetic number, because the mean of its divisors is an integer number (132596997).

Almost surely, 2^265193993 is an apocalyptic number.

It is an amenable number.

265193993 is a deficient number, since it is larger than the sum of its proper divisors (1).

265193993 is an equidigital number, since it uses as much as digits as its factorization.

265193993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 393660, while the sum is 47.

The square root of 265193993 is about 16284.7779536597. Note that the first 3 decimals coincide. The cubic root of 265193993 is about 642.4725261913.

The spelling of 265193993 in words is "two hundred sixty-five million, one hundred ninety-three thousand, nine hundred ninety-three".