261214193 has 2 divisors, whose sum is σ = 261214194. Its totient is φ = 261214192.

The previous prime is 261214171. The next prime is 261214229. The reversal of 261214193 is 391412162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138956944 + 122257249 = 11788^2 + 11057^2 .

It is a cyclic number.

It is not a de Polignac number, because 261214193 - 2¹⁸ = 260952049 is a prime.

It is not a weakly prime, because it can be changed into another prime (261214123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130607096 + 130607097.

It is an arithmetic number, because the mean of its divisors is an integer number (130607097).

Almost surely, 2^261214193 is an apocalyptic number.

It is an amenable number.

261214193 is a deficient number, since it is larger than the sum of its proper divisors (1).

261214193 is an equidigital number, since it uses as much as digits as its factorization.

261214193 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 29.

The square root of 261214193 is about 16162.1221688242. The cubic root of 261214193 is about 639.2424247297.

The spelling of 261214193 in words is "two hundred sixty-one million, two hundred fourteen thousand, one hundred ninety-three".