61026891 has 8 divisors (see below), whose sum is σ = 81453120. Its totient is φ = 40642632.

The previous prime is 61026869. The next prime is 61026913. The reversal of 61026891 is 19862016.

61026891 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61026869) and next prime (61026913).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61026891 - 2⁵ = 61026859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61026851) 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 7 ways as a sum of consecutive naturals, for example, 6925 + ... + 13038.

It is an arithmetic number, because the mean of its divisors is an integer number (10181640).

Almost surely, 2^61026891 is an apocalyptic number.

61026891 is a deficient number, since it is larger than the sum of its proper divisors (20426229).

61026891 is a wasteful number, since it uses less digits than its factorization.

61026891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20985.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 61026891 is about 7811.9710060906. The cubic root of 61026891 is about 393.7075548099.

The spelling of 61026891 in words is "sixty-one million, twenty-six thousand, eight hundred ninety-one".