261137067 has 4 divisors (see below), whose sum is σ = 348182760. Its totient is φ = 174091376.

The previous prime is 261137039. The next prime is 261137069. The reversal of 261137067 is 760731162.

261137067 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 261137067 - 2²⁶ = 194028203 is a prime.

It is a super-2 number, since 2×261137067² = 136385135522724978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (261137069) 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, 43522842 + ... + 43522847.

It is an arithmetic number, because the mean of its divisors is an integer number (87045690).

Almost surely, 2^261137067 is an apocalyptic number.

261137067 is a deficient number, since it is larger than the sum of its proper divisors (87045693).

261137067 is an equidigital number, since it uses as much as digits as its factorization.

261137067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87045692.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 261137067 is about 16159.7359817542. The cubic root of 261137067 is about 639.1795043809.

The spelling of 261137067 in words is "two hundred sixty-one million, one hundred thirty-seven thousand, sixty-seven".