632447989 has 4 divisors (see below), whose sum is σ = 634359040. Its totient is φ = 630536940.

The previous prime is 632447953. The next prime is 632448013. The reversal of 632447989 is 989744236.

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 a cyclic number.

It is not a de Polignac number, because 632447989 - 2⁹ = 632447477 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 (632447909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 955029 + ... + 955690.

It is an arithmetic number, because the mean of its divisors is an integer number (158589760).

Almost surely, 2^632447989 is an apocalyptic number.

It is an amenable number.

632447989 is a deficient number, since it is larger than the sum of its proper divisors (1911051).

632447989 is a wasteful number, since it uses less digits than its factorization.

632447989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1911050.

The product of its digits is 2612736, while the sum is 52.

The square root of 632447989 is about 25148.5186243643. The cubic root of 632447989 is about 858.3708064284.

The spelling of 632447989 in words is "six hundred thirty-two million, four hundred forty-seven thousand, nine hundred eighty-nine".