16367621 has 2 divisors, whose sum is σ = 16367622. Its totient is φ = 16367620.

The previous prime is 16367599. The next prime is 16367623. The reversal of 16367621 is 12676361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15288100 + 1079521 = 3910^2 + 1039^2 .

It is a cyclic number.

It is not a de Polignac number, because 16367621 - 2⁶ = 16367557 is a prime.

Together with 16367623, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16367623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8183810 + 8183811.

It is an arithmetic number, because the mean of its divisors is an integer number (8183811).

Almost surely, 2^16367621 is an apocalyptic number.

It is an amenable number.

16367621 is a deficient number, since it is larger than the sum of its proper divisors (1).

16367621 is an equidigital number, since it uses as much as digits as its factorization.

16367621 is an evil number, because the sum of its binary digits is even.

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

The square root of 16367621 is about 4045.6916590368. The cubic root of 16367621 is about 253.8995045432.

The spelling of 16367621 in words is "sixteen million, three hundred sixty-seven thousand, six hundred twenty-one".