63921373 has 2 divisors, whose sum is σ = 63921374. Its totient is φ = 63921372.

The previous prime is 63921359. The next prime is 63921409. The reversal of 63921373 is 37312936.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60886809 + 3034564 = 7803^2 + 1742^2 .

It is a cyclic number.

It is not a de Polignac number, because 63921373 - 2⁹ = 63920861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63921673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31960686 + 31960687.

It is an arithmetic number, because the mean of its divisors is an integer number (31960687).

Almost surely, 2^63921373 is an apocalyptic number.

It is an amenable number.

63921373 is a deficient number, since it is larger than the sum of its proper divisors (1).

63921373 is an equidigital number, since it uses as much as digits as its factorization.

63921373 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20412, while the sum is 34.

The square root of 63921373 is about 7995.0843022447. The cubic root of 63921373 is about 399.8361266230.

The spelling of 63921373 in words is "sixty-three million, nine hundred twenty-one thousand, three hundred seventy-three".