63440989 has 8 divisors (see below), whose sum is σ = 64952640. Its totient is φ = 61944000.

The previous prime is 63440987. The next prime is 63441011. The reversal of 63440989 is 98904436.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63440989 - 2¹ = 63440987 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 (63440983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5349 + ... + 12469.

It is an arithmetic number, because the mean of its divisors is an integer number (8119080).

Almost surely, 2^63440989 is an apocalyptic number.

It is an amenable number.

63440989 is a deficient number, since it is larger than the sum of its proper divisors (1511651).

63440989 is a wasteful number, since it uses less digits than its factorization.

63440989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7331.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 63440989 is about 7964.9851851714. The cubic root of 63440989 is about 398.8319864305.

The spelling of 63440989 in words is "sixty-three million, four hundred forty thousand, nine hundred eighty-nine".