261493411 has 4 divisors (see below), whose sum is σ = 261670752. Its totient is φ = 261316072.

The previous prime is 261493387. The next prime is 261493433. The reversal of 261493411 is 114394162.

261493411 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 261493411 - 2⁷ = 261493283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (261493451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86440 + ... + 89413.

It is an arithmetic number, because the mean of its divisors is an integer number (65417688).

Almost surely, 2^261493411 is an apocalyptic number.

261493411 is a deficient number, since it is larger than the sum of its proper divisors (177341).

261493411 is a wasteful number, since it uses less digits than its factorization.

261493411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177340.

The product of its digits is 5184, while the sum is 31.

The square root of 261493411 is about 16170.7578981320. The cubic root of 261493411 is about 639.4701107146.

The spelling of 261493411 in words is "two hundred sixty-one million, four hundred ninety-three thousand, four hundred eleven".