441249981 has 4 divisors (see below), whose sum is σ = 588333312. Its totient is φ = 294166652.

The previous prime is 441249979. The next prime is 441249983. The reversal of 441249981 is 189942144.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (441249979) and next prime (441249983).

It is a cyclic number.

It is not a de Polignac number, because 441249981 - 2¹ = 441249979 is a prime.

It is a super-2 number, since 2×441249981² = 389403091465000722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (441249983) 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, 73541661 + ... + 73541666.

It is an arithmetic number, because the mean of its divisors is an integer number (147083328).

Almost surely, 2^441249981 is an apocalyptic number.

It is an amenable number.

441249981 is a deficient number, since it is larger than the sum of its proper divisors (147083331).

441249981 is a wasteful number, since it uses less digits than its factorization.

441249981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147083330.

The product of its digits is 82944, while the sum is 42.

The square root of 441249981 is about 21005.9510853472. The cubic root of 441249981 is about 761.3100563866.

The spelling of 441249981 in words is "four hundred forty-one million, two hundred forty-nine thousand, nine hundred eighty-one".