261703951 has 2 divisors, whose sum is σ = 261703952. Its totient is φ = 261703950.

The previous prime is 261703931. The next prime is 261703957. The reversal of 261703951 is 159307162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 261703951 - 2⁵ = 261703919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261703957) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130851975 + 130851976.

It is an arithmetic number, because the mean of its divisors is an integer number (130851976).

Almost surely, 2^261703951 is an apocalyptic number.

261703951 is a deficient number, since it is larger than the sum of its proper divisors (1).

261703951 is an equidigital number, since it uses as much as digits as its factorization.

261703951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 261703951 is about 16177.2664872654. The cubic root of 261703951 is about 639.6416866375.

The spelling of 261703951 in words is "two hundred sixty-one million, seven hundred three thousand, nine hundred fifty-one".