16627631 has 4 divisors (see below), whose sum is σ = 16635792. Its totient is φ = 16619472.

The previous prime is 16627607. The next prime is 16627661. The reversal of 16627631 is 13672661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13672661 = 113 ⋅120997.

It is a cyclic number.

It is not a de Polignac number, because 16627631 - 2¹⁴ = 16611247 is a prime.

It is a super-2 number, since 2×16627631² = 552956225344322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16627661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1835 + ... + 6051.

It is an arithmetic number, because the mean of its divisors is an integer number (4158948).

Almost surely, 2^16627631 is an apocalyptic number.

16627631 is a deficient number, since it is larger than the sum of its proper divisors (8161).

16627631 is an equidigital number, since it uses as much as digits as its factorization.

16627631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8160.

The product of its digits is 9072, while the sum is 32.

The square root of 16627631 is about 4077.6992287318. The cubic root of 16627631 is about 255.2368989059.

The spelling of 16627631 in words is "sixteen million, six hundred twenty-seven thousand, six hundred thirty-one".