541781989 has 4 divisors (see below), whose sum is σ = 619179424. Its totient is φ = 464384556.

The previous prime is 541781987. The next prime is 541782001. The reversal of 541781989 is 989187145.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 541781989 - 2¹ = 541781987 is a prime.

It is a super-2 number, since 2×541781989² = 587055447209592242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541781987) 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, 38698707 + ... + 38698720.

It is an arithmetic number, because the mean of its divisors is an integer number (154794856).

Almost surely, 2^541781989 is an apocalyptic number.

It is an amenable number.

541781989 is a deficient number, since it is larger than the sum of its proper divisors (77397435).

541781989 is an equidigital number, since it uses as much as digits as its factorization.

541781989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77397434.

The product of its digits is 725760, while the sum is 52.

The square root of 541781989 is about 23276.2107955741. The cubic root of 541781989 is about 815.2200537436.

The spelling of 541781989 in words is "five hundred forty-one million, seven hundred eighty-one thousand, nine hundred eighty-nine".