262561493 has 2 divisors, whose sum is σ = 262561494. Its totient is φ = 262561492.

The previous prime is 262561469. The next prime is 262561501. The reversal of 262561493 is 394165262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 165302449 + 97259044 = 12857^2 + 9862^2 .

It is a cyclic number.

It is not a de Polignac number, because 262561493 - 2¹⁰ = 262560469 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (262561423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 131280746 + 131280747.

It is an arithmetic number, because the mean of its divisors is an integer number (131280747).

Almost surely, 2^262561493 is an apocalyptic number.

It is an amenable number.

262561493 is a deficient number, since it is larger than the sum of its proper divisors (1).

262561493 is an equidigital number, since it uses as much as digits as its factorization.

262561493 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 38.

The square root of 262561493 is about 16203.7493500733. The cubic root of 262561493 is about 640.3395764660.

The spelling of 262561493 in words is "two hundred sixty-two million, five hundred sixty-one thousand, four hundred ninety-three".