63924175397 has 4 divisors (see below), whose sum is σ = 63925306380. Its totient is φ = 63923044416.

The previous prime is 63924175309. The next prime is 63924175409. The reversal of 63924175397 is 79357142936.

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 48520635076 + 15403540321 = 220274^2 + 124111^2 .

It is a cyclic number.

It is not a de Polignac number, because 63924175397 - 2²² = 63919981093 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 (63924175297) 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, 475988 + ... + 595325.

It is an arithmetic number, because the mean of its divisors is an integer number (15981326595).

Almost surely, 2^63924175397 is an apocalyptic number.

It is an amenable number.

63924175397 is a deficient number, since it is larger than the sum of its proper divisors (1130983).

63924175397 is a wasteful number, since it uses less digits than its factorization.

63924175397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1130982.

The product of its digits is 8573040, while the sum is 56.

The spelling of 63924175397 in words is "sixty-three billion, nine hundred twenty-four million, one hundred seventy-five thousand, three hundred ninety-seven".