261497083 has 2 divisors, whose sum is σ = 261497084. Its totient is φ = 261497082.

The previous prime is 261497069. The next prime is 261497087. The reversal of 261497083 is 380794162.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261497083 is a prime.

It is not a weakly prime, because it can be changed into another prime (261497087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130748541 + 130748542.

It is an arithmetic number, because the mean of its divisors is an integer number (130748542).

Almost surely, 2^261497083 is an apocalyptic number.

261497083 is a deficient number, since it is larger than the sum of its proper divisors (1).

261497083 is an equidigital number, since it uses as much as digits as its factorization.

261497083 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72576, while the sum is 40.

The square root of 261497083 is about 16170.8714360111. The cubic root of 261497083 is about 639.4731039363.

The spelling of 261497083 in words is "two hundred sixty-one million, four hundred ninety-seven thousand, eighty-three".