63972076349 has 4 divisors (see below), whose sum is σ = 64848406236. Its totient is φ = 63095746464.

The previous prime is 63972076339. The next prime is 63972076387. The reversal of 63972076349 is 94367027936.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27149152900 + 36822923449 = 164770^2 + 191893^2 .

It is a cyclic number.

It is not a de Polignac number, because 63972076349 - 2⁸ = 63972076093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 63972076294 and 63972076303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63972076309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438164834 + ... + 438164979.

It is an arithmetic number, because the mean of its divisors is an integer number (16212101559).

Almost surely, 2^63972076349 is an apocalyptic number.

It is an amenable number.

63972076349 is a deficient number, since it is larger than the sum of its proper divisors (876329887).

63972076349 is an equidigital number, since it uses as much as digits as its factorization.

63972076349 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876329886.

The product of its (nonzero) digits is 10287648, while the sum is 56.

The spelling of 63972076349 in words is "sixty-three billion, nine hundred seventy-two million, seventy-six thousand, three hundred forty-nine".