261508349 has 8 divisors (see below), whose sum is σ = 265298880. Its totient is φ = 257733216.

The previous prime is 261508339. The next prime is 261508369. The reversal of 261508349 is 943805162.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 261508349 - 2⁴ = 261508333 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (261508319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32849 + ... + 40025.

It is an arithmetic number, because the mean of its divisors is an integer number (33162360).

Almost surely, 2^261508349 is an apocalyptic number.

It is an amenable number.

261508349 is a deficient number, since it is larger than the sum of its proper divisors (3790531).

261508349 is an equidigital number, since it uses as much as digits as its factorization.

261508349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7699.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 261508349 is about 16171.2197746490. The cubic root of 261508349 is about 639.4822872134.

The spelling of 261508349 in words is "two hundred sixty-one million, five hundred eight thousand, three hundred forty-nine".