261414169 has 2 divisors, whose sum is σ = 261414170. Its totient is φ = 261414168.

The previous prime is 261414163. The next prime is 261414173. The reversal of 261414169 is 961414162.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 254721600 + 6692569 = 15960^2 + 2587^2 .

It is a cyclic number.

It is not a de Polignac number, because 261414169 - 2¹¹ = 261412121 is a prime.

It is a super-2 number, since 2×261414169² = 136674735507921122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (261414163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130707084 + 130707085.

It is an arithmetic number, because the mean of its divisors is an integer number (130707085).

Almost surely, 2^261414169 is an apocalyptic number.

It is an amenable number.

261414169 is a deficient number, since it is larger than the sum of its proper divisors (1).

261414169 is an equidigital number, since it uses as much as digits as its factorization.

261414169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 261414169 is about 16168.3075490294. The cubic root of 261414169 is about 639.4055099665.

The spelling of 261414169 in words is "two hundred sixty-one million, four hundred fourteen thousand, one hundred sixty-nine".