63440993 has 16 divisors (see below), whose sum is σ = 79277184. Its totient is φ = 49320960.

The previous prime is 63440987. The next prime is 63441011. The reversal of 63440993 is 39904436.

It is a cyclic number.

It is not a de Polignac number, because 63440993 - 2¹⁰ = 63439969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63440963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51521 + ... + 52737.

It is an arithmetic number, because the mean of its divisors is an integer number (4954824).

Almost surely, 2^63440993 is an apocalyptic number.

It is an amenable number.

63440993 is a deficient number, since it is larger than the sum of its proper divisors (15836191).

63440993 is a wasteful number, since it uses less digits than its factorization.

63440993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1912.

The product of its (nonzero) digits is 69984, while the sum is 38.

The square root of 63440993 is about 7964.9854362704. The cubic root of 63440993 is about 398.8319948127.

The spelling of 63440993 in words is "sixty-three million, four hundred forty thousand, nine hundred ninety-three".