16690613 has 2 divisors, whose sum is σ = 16690614. Its totient is φ = 16690612.

The previous prime is 16690603. The next prime is 16690621. The reversal of 16690613 is 31609661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16662724 + 27889 = 4082^2 + 167^2 .

It is an emirp because it is prime and its reverse (31609661) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16690613 - 2¹² = 16686517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16690613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16690603) 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 as a sum of consecutive naturals, namely, 8345306 + 8345307.

It is an arithmetic number, because the mean of its divisors is an integer number (8345307).

Almost surely, 2^16690613 is an apocalyptic number.

It is an amenable number.

16690613 is a deficient number, since it is larger than the sum of its proper divisors (1).

16690613 is an equidigital number, since it uses as much as digits as its factorization.

16690613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 16690613 is about 4085.4146668362. The cubic root of 16690613 is about 255.5587542623.

The spelling of 16690613 in words is "sixteen million, six hundred ninety thousand, six hundred thirteen".