261090363 has 4 divisors (see below), whose sum is σ = 348120488. Its totient is φ = 174060240.

The previous prime is 261090331. The next prime is 261090371. The reversal of 261090363 is 363090162.

It is a happy number.

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

It is not a de Polignac number, because 261090363 - 2⁵ = 261090331 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 261090363.

It is not an unprimeable number, because it can be changed into a prime (261090383) 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, 43515058 + ... + 43515063.

It is an arithmetic number, because the mean of its divisors is an integer number (87030122).

Almost surely, 2^261090363 is an apocalyptic number.

261090363 is a deficient number, since it is larger than the sum of its proper divisors (87030125).

261090363 is an equidigital number, since it uses as much as digits as its factorization.

261090363 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87030124.

The product of its (nonzero) digits is 5832, while the sum is 30.

The square root of 261090363 is about 16158.2908440218. The cubic root of 261090363 is about 639.1413966549.

The spelling of 261090363 in words is "two hundred sixty-one million, ninety thousand, three hundred sixty-three".