39863421 has 24 divisors (see below), whose sum is σ = 64311520. Its totient is φ = 24529392.

The previous prime is 39863413. The next prime is 39863437. The reversal of 39863421 is 12436893.

It is not a de Polignac number, because 39863421 - 2³ = 39863413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39863491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3151 + ... + 9468.

Almost surely, 2^39863421 is an apocalyptic number.

It is an amenable number.

39863421 is a deficient number, since it is larger than the sum of its proper divisors (24448099).

39863421 is a wasteful number, since it uses less digits than its factorization.

39863421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12647 (or 12635 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 39863421 is about 6313.7485695900. The cubic root of 39863421 is about 341.6055007963.

The spelling of 39863421 in words is "thirty-nine million, eight hundred sixty-three thousand, four hundred twenty-one".