261099301 has 2 divisors, whose sum is σ = 261099302. Its totient is φ = 261099300.

The previous prime is 261099283. The next prime is 261099313. The reversal of 261099301 is 103990162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134536801 + 126562500 = 11599^2 + 11250^2 .

It is a cyclic number.

It is not a de Polignac number, because 261099301 - 2¹³ = 261091109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (261099331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130549650 + 130549651.

It is an arithmetic number, because the mean of its divisors is an integer number (130549651).

Almost surely, 2^261099301 is an apocalyptic number.

It is an amenable number.

261099301 is a deficient number, since it is larger than the sum of its proper divisors (1).

261099301 is an equidigital number, since it uses as much as digits as its factorization.

261099301 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2916, while the sum is 31.

The square root of 261099301 is about 16158.5674179365. The cubic root of 261099301 is about 639.1486898905.

The spelling of 261099301 in words is "two hundred sixty-one million, ninety-nine thousand, three hundred one".