261006443 has 2 divisors, whose sum is σ = 261006444. Its totient is φ = 261006442.

The previous prime is 261006407. The next prime is 261006479. The reversal of 261006443 is 344600162.

It is a balanced prime because it is at equal distance from previous prime (261006407) and next prime (261006479).

It is a cyclic number.

It is not a de Polignac number, because 261006443 - 2⁶ = 261006379 is a prime.

It is not a weakly prime, because it can be changed into another prime (261006043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130503221 + 130503222.

It is an arithmetic number, because the mean of its divisors is an integer number (130503222).

Almost surely, 2^261006443 is an apocalyptic number.

261006443 is a deficient number, since it is larger than the sum of its proper divisors (1).

261006443 is an equidigital number, since it uses as much as digits as its factorization.

261006443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 261006443 is about 16155.6938260169. The cubic root of 261006443 is about 639.0729114338.

The spelling of 261006443 in words is "two hundred sixty-one million, six thousand, four hundred forty-three".