63973381 has 2 divisors, whose sum is σ = 63973382. Its totient is φ = 63973380.

The previous prime is 63973337. The next prime is 63973387. The reversal of 63973381 is 18337936.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 60980481 + 2992900 = 7809^2 + 1730^2 .

It is a cyclic number.

It is not a de Polignac number, because 63973381 - 2¹¹ = 63971333 is a prime.

It is a super-2 number, since 2×63973381² = 8185186953142322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63973387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31986690 + 31986691.

It is an arithmetic number, because the mean of its divisors is an integer number (31986691).

Almost surely, 2^63973381 is an apocalyptic number.

It is an amenable number.

63973381 is a deficient number, since it is larger than the sum of its proper divisors (1).

63973381 is an equidigital number, since it uses as much as digits as its factorization.

63973381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81648, while the sum is 40.

The square root of 63973381 is about 7998.3361394730. The cubic root of 63973381 is about 399.9445360597.

The spelling of 63973381 in words is "sixty-three million, nine hundred seventy-three thousand, three hundred eighty-one".