61091267 has 4 divisors (see below), whose sum is σ = 61143336. Its totient is φ = 61039200.

The previous prime is 61091263. The next prime is 61091281. The reversal of 61091267 is 76219016.

It is a happy number.

61091267 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 61091267 - 2² = 61091263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61091263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24233 + ... + 26634.

It is an arithmetic number, because the mean of its divisors is an integer number (15285834).

Almost surely, 2^61091267 is an apocalyptic number.

61091267 is a deficient number, since it is larger than the sum of its proper divisors (52069).

61091267 is a wasteful number, since it uses less digits than its factorization.

61091267 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52068.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 61091267 is about 7816.0902630407. The cubic root of 61091267 is about 393.8459441345.

The spelling of 61091267 in words is "sixty-one million, ninety-one thousand, two hundred sixty-seven".