63951013 has 4 divisors (see below), whose sum is σ = 73086880. Its totient is φ = 54815148.

The previous prime is 63951001. The next prime is 63951023. The reversal of 63951013 is 31015936.

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 63951013 - 2⁹ = 63950501 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 (63951023) 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, 4567923 + ... + 4567936.

It is an arithmetic number, because the mean of its divisors is an integer number (18271720).

Almost surely, 2^63951013 is an apocalyptic number.

It is an amenable number.

63951013 is a deficient number, since it is larger than the sum of its proper divisors (9135867).

63951013 is an equidigital number, since it uses as much as digits as its factorization.

63951013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9135866.

The product of its (nonzero) digits is 2430, while the sum is 28.

The square root of 63951013 is about 7996.9377264050. The cubic root of 63951013 is about 399.8979177002.

Adding to 63951013 its reverse (31015936), we get a palindrome (94966949).

The spelling of 63951013 in words is "sixty-three million, nine hundred fifty-one thousand, thirteen".