16621079 has 2 divisors, whose sum is σ = 16621080. Its totient is φ = 16621078.

The previous prime is 16621069. The next prime is 16621093. The reversal of 16621079 is 97012661.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16621079 - 2¹² = 16616983 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16621039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8310539 + 8310540.

It is an arithmetic number, because the mean of its divisors is an integer number (8310540).

Almost surely, 2^16621079 is an apocalyptic number.

16621079 is a deficient number, since it is larger than the sum of its proper divisors (1).

16621079 is an equidigital number, since it uses as much as digits as its factorization.

16621079 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 16621079 is about 4076.8957553511. The cubic root of 16621079 is about 255.2033697386.

The spelling of 16621079 in words is "sixteen million, six hundred twenty-one thousand, seventy-nine".