261093941 has 4 divisors (see below), whose sum is σ = 268150572. Its totient is φ = 254037312.

The previous prime is 261093919. The next prime is 261093947. The reversal of 261093941 is 149390162.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 149390162 = 2 ⋅74695081.

It can be written as a sum of positive squares in 2 ways, for example, as 238578916 + 22515025 = 15446^2 + 4745^2 .

It is a cyclic number.

It is not a de Polignac number, because 261093941 - 2¹⁸ = 260831797 is a prime.

It is a super-2 number, since 2×261093941² = 136340092053822962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261093947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3528260 + ... + 3528333.

It is an arithmetic number, because the mean of its divisors is an integer number (67037643).

Almost surely, 2^261093941 is an apocalyptic number.

It is an amenable number.

261093941 is a deficient number, since it is larger than the sum of its proper divisors (7056631).

261093941 is an equidigital number, since it uses as much as digits as its factorization.

261093941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7056630.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 261093941 is about 16158.4015607980. The cubic root of 261093941 is about 639.1443162539.

The spelling of 261093941 in words is "two hundred sixty-one million, ninety-three thousand, nine hundred forty-one".