541444991 has 4 divisors (see below), whose sum is σ = 545079000. Its totient is φ = 537810984.

The previous prime is 541444921. The next prime is 541444997. The reversal of 541444991 is 199444145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 199444145 = 5 ⋅39888829.

It is a cyclic number.

It is not a de Polignac number, because 541444991 - 2²² = 537250687 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 (541444997) 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, 1816781 + ... + 1817078.

It is an arithmetic number, because the mean of its divisors is an integer number (136269750).

Almost surely, 2^541444991 is an apocalyptic number.

541444991 is a deficient number, since it is larger than the sum of its proper divisors (3634009).

541444991 is a wasteful number, since it uses less digits than its factorization.

541444991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3634008.

The product of its digits is 103680, while the sum is 41.

The square root of 541444991 is about 23268.9705616729. The cubic root of 541444991 is about 815.0509915779.

It can be divided in two parts, 5414 and 44991, that added together give a palindrome (50405).

The spelling of 541444991 in words is "five hundred forty-one million, four hundred forty-four thousand, nine hundred ninety-one".