42664449 has 4 divisors (see below), whose sum is σ = 56885936. Its totient is φ = 28442964.

The previous prime is 42664381. The next prime is 42664451. The reversal of 42664449 is 94446624.

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 not a de Polignac number, because 42664449 - 2⁹ = 42663937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42664469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7110739 + ... + 7110744.

It is an arithmetic number, because the mean of its divisors is an integer number (14221484).

Almost surely, 2^42664449 is an apocalyptic number.

It is an amenable number.

42664449 is a deficient number, since it is larger than the sum of its proper divisors (14221487).

42664449 is a wasteful number, since it uses less digits than its factorization.

42664449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14221486.

The product of its digits is 165888, while the sum is 39.

The square root of 42664449 is about 6531.8028904737. The cubic root of 42664449 is about 349.4261316950.

The spelling of 42664449 in words is "forty-two million, six hundred sixty-four thousand, four hundred forty-nine".