63873434 has 4 divisors (see below), whose sum is σ = 95810154. Its totient is φ = 31936716.

The previous prime is 63873413. The next prime is 63873443. The reversal of 63873434 is 43437836.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 32547025 + 31326409 = 5705^2 + 5597^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15968357 + ... + 15968360.

Almost surely, 2^63873434 is an apocalyptic number.

63873434 is a deficient number, since it is larger than the sum of its proper divisors (31936720).

63873434 is a wasteful number, since it uses less digits than its factorization.

63873434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31936719.

The product of its digits is 145152, while the sum is 38.

The square root of 63873434 is about 7992.0857102511. The cubic root of 63873434 is about 399.7361468254.

The spelling of 63873434 in words is "sixty-three million, eight hundred seventy-three thousand, four hundred thirty-four".