261076393 has 2 divisors, whose sum is σ = 261076394. Its totient is φ = 261076392.

The previous prime is 261076369. The next prime is 261076411. The reversal of 261076393 is 393670162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251761689 + 9314704 = 15867^2 + 3052^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-261076393 is a prime.

It is not a weakly prime, because it can be changed into another prime (261074393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130538196 + 130538197.

It is an arithmetic number, because the mean of its divisors is an integer number (130538197).

Almost surely, 2^261076393 is an apocalyptic number.

It is an amenable number.

261076393 is a deficient number, since it is larger than the sum of its proper divisors (1).

261076393 is an equidigital number, since it uses as much as digits as its factorization.

261076393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 37.

The square root of 261076393 is about 16157.8585524196. The cubic root of 261076393 is about 639.1299970709.

It can be divided in two parts, 2610 and 76393, that added together give a triangular number (79003 = T₃₉₇).

The spelling of 261076393 in words is "two hundred sixty-one million, seventy-six thousand, three hundred ninety-three".