261479783 has 2 divisors, whose sum is σ = 261479784. Its totient is φ = 261479782.

The previous prime is 261479759. The next prime is 261479807. The reversal of 261479783 is 387974162.

It is a balanced prime because it is at equal distance from previous prime (261479759) and next prime (261479807).

It is a cyclic number.

It is not a de Polignac number, because 261479783 - 2⁸ = 261479527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261479983) 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, 130739891 + 130739892.

It is an arithmetic number, because the mean of its divisors is an integer number (130739892).

Almost surely, 2^261479783 is an apocalyptic number.

261479783 is a deficient number, since it is larger than the sum of its proper divisors (1).

261479783 is an equidigital number, since it uses as much as digits as its factorization.

261479783 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 47.

The square root of 261479783 is about 16170.3365147420. The cubic root of 261479783 is about 639.4590016392.

It can be divided in two parts, 261479 and 783, that added together give a palindrome (262262).

The spelling of 261479783 in words is "two hundred sixty-one million, four hundred seventy-nine thousand, seven hundred eighty-three".