58261891 has 4 divisors (see below), whose sum is σ = 58277232. Its totient is φ = 58246552.

The previous prime is 58261877. The next prime is 58261901. The reversal of 58261891 is 19816285.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 58261891 - 2⁵ = 58261859 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (58261871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2706 + ... + 11128.

It is an arithmetic number, because the mean of its divisors is an integer number (14569308).

Almost surely, 2^58261891 is an apocalyptic number.

58261891 is the 4828-th centered pentagonal number.

58261891 is a deficient number, since it is larger than the sum of its proper divisors (15341).

58261891 is an equidigital number, since it uses as much as digits as its factorization.

58261891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15340.

The product of its digits is 34560, while the sum is 40.

The square root of 58261891 is about 7632.9477267960. The cubic root of 58261891 is about 387.6694030040.

The spelling of 58261891 in words is "fifty-eight million, two hundred sixty-one thousand, eight hundred ninety-one".