63387431 has 4 divisors (see below), whose sum is σ = 63813000. Its totient is φ = 62961864.

The previous prime is 63387421. The next prime is 63387449. The reversal of 63387431 is 13478336.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63387431 is a prime.

It is a super-2 number, since 2×63387431² = 8035932817559522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 63387391 and 63387400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63387421) 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, 212561 + ... + 212858.

It is an arithmetic number, because the mean of its divisors is an integer number (15953250).

Almost surely, 2^63387431 is an apocalyptic number.

63387431 is a deficient number, since it is larger than the sum of its proper divisors (425569).

63387431 is a wasteful number, since it uses less digits than its factorization.

63387431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425568.

The product of its digits is 36288, while the sum is 35.

The square root of 63387431 is about 7961.6223849163. The cubic root of 63387431 is about 398.7197211706.

The spelling of 63387431 in words is "sixty-three million, three hundred eighty-seven thousand, four hundred thirty-one".