16021879 has 2 divisors, whose sum is σ = 16021880. Its totient is φ = 16021878.

The previous prime is 16021867. The next prime is 16021897. The reversal of 16021879 is 97812061.

It is a happy number.

Together with next prime (16021897) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 16021879 - 2⁷ = 16021751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16021829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8010939 + 8010940.

It is an arithmetic number, because the mean of its divisors is an integer number (8010940).

Almost surely, 2^16021879 is an apocalyptic number.

16021879 is a deficient number, since it is larger than the sum of its proper divisors (1).

16021879 is an equidigital number, since it uses as much as digits as its factorization.

16021879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 16021879 is about 4002.7339406960. The cubic root of 16021879 is about 252.0990152179.

It can be divided in two parts, 16021 and 879, that added together give a square (16900 = 130²).

The spelling of 16021879 in words is "sixteen million, twenty-one thousand, eight hundred seventy-nine".