384307631 has 4 divisors (see below), whose sum is σ = 385164000. Its totient is φ = 383451264.

The previous prime is 384307619. The next prime is 384307633. The reversal of 384307631 is 136703483.

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-384307631 is a prime.

It is a super-2 number, since 2×384307631² = 295384710489664322, 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 = 384307591 and 384307600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (384307633) 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, 427511 + ... + 428408.

It is an arithmetic number, because the mean of its divisors is an integer number (96291000).

Almost surely, 2^384307631 is an apocalyptic number.

384307631 is a deficient number, since it is larger than the sum of its proper divisors (856369).

384307631 is an equidigital number, since it uses as much as digits as its factorization.

384307631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 856368.

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

The square root of 384307631 is about 19603.7657351847. The cubic root of 384307631 is about 727.0422834575.

The spelling of 384307631 in words is "three hundred eighty-four million, three hundred seven thousand, six hundred thirty-one".