30663631 has 4 divisors (see below), whose sum is σ = 32467392. Its totient is φ = 28859872.

The previous prime is 30663629. The next prime is 30663637. The reversal of 30663631 is 13636603.

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

It is a cyclic number.

It is not a de Polignac number, because 30663631 - 2¹ = 30663629 is a prime.

It is a super-2 number, since 2×30663631² = 1880516532208322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30663631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30663637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 901855 + ... + 901888.

It is an arithmetic number, because the mean of its divisors is an integer number (8116848).

Almost surely, 2^30663631 is an apocalyptic number.

30663631 is a deficient number, since it is larger than the sum of its proper divisors (1803761).

30663631 is a wasteful number, since it uses less digits than its factorization.

30663631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1803760.

The product of its (nonzero) digits is 5832, while the sum is 28.

The square root of 30663631 is about 5537.4751466711. The cubic root of 30663631 is about 312.9977339607.

The spelling of 30663631 in words is "thirty million, six hundred sixty-three thousand, six hundred thirty-one".