63940003 has 4 divisors (see below), whose sum is σ = 64658520. Its totient is φ = 63221488.

The previous prime is 63939989. The next prime is 63940007. The reversal of 63940003 is 30004936.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63940003 - 2⁵ = 63939971 is a prime.

It is a super-3 number, since 3×63940003³ (a number of 24 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 63940003.

It is not an unprimeable number, because it can be changed into a prime (63940007) 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, 359125 + ... + 359302.

It is an arithmetic number, because the mean of its divisors is an integer number (16164630).

Almost surely, 2^63940003 is an apocalyptic number.

63940003 is a deficient number, since it is larger than the sum of its proper divisors (718517).

63940003 is an equidigital number, since it uses as much as digits as its factorization.

63940003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718516.

The product of its (nonzero) digits is 1944, while the sum is 25.

The square root of 63940003 is about 7996.2493082695. The cubic root of 63940003 is about 399.8749671711.

Adding to 63940003 its reverse (30004936), we get a palindrome (93944939).

The spelling of 63940003 in words is "sixty-three million, nine hundred forty thousand, three".