261913079 has 8 divisors (see below), whose sum is σ = 271235712. Its totient is φ = 252645120.

The previous prime is 261913073. The next prime is 261913087. The reversal of 261913079 is 970319162.

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 261913079 - 2¹⁶ = 261847543 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 (261913073) 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, 3794 + ... + 23199.

It is an arithmetic number, because the mean of its divisors is an integer number (33904464).

Almost surely, 2^261913079 is an apocalyptic number.

261913079 is a deficient number, since it is larger than the sum of its proper divisors (9322633).

261913079 is a wasteful number, since it uses less digits than its factorization.

261913079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27337.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 261913079 is about 16183.7288348514. The cubic root of 261913079 is about 639.8120208017.

The spelling of 261913079 in words is "two hundred sixty-one million, nine hundred thirteen thousand, seventy-nine".