261053803 has 2 divisors, whose sum is σ = 261053804. Its totient is φ = 261053802.

The previous prime is 261053789. The next prime is 261053827. The reversal of 261053803 is 308350162.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 261053803 - 2⁹ = 261053291 is a prime.

It is not a weakly prime, because it can be changed into another prime (261053873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130526901 + 130526902.

It is an arithmetic number, because the mean of its divisors is an integer number (130526902).

Almost surely, 2^261053803 is an apocalyptic number.

261053803 is a deficient number, since it is larger than the sum of its proper divisors (1).

261053803 is an equidigital number, since it uses as much as digits as its factorization.

261053803 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 261053803 is about 16157.1594966442. The cubic root of 261053803 is about 639.1115626669. Note that the first 3 decimals are identical.

The spelling of 261053803 in words is "two hundred sixty-one million, fifty-three thousand, eight hundred three".