200019979 has 2 divisors, whose sum is σ = 200019980. Its totient is φ = 200019978.

The previous prime is 200019949. The next prime is 200019997. The reversal of 200019979 is 979910002.

Together with next prime (200019997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 200019979 - 2¹¹ = 200017931 is a prime.

It is not a weakly prime, because it can be changed into another prime (200019929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100009989 + 100009990.

It is an arithmetic number, because the mean of its divisors is an integer number (100009990).

Almost surely, 2^200019979 is an apocalyptic number.

200019979 is a deficient number, since it is larger than the sum of its proper divisors (1).

200019979 is an equidigital number, since it uses as much as digits as its factorization.

200019979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10206, while the sum is 37.

The square root of 200019979 is about 14142.8419704103. The cubic root of 200019979 is about 584.8230199777.

The spelling of 200019979 in words is "two hundred million, nineteen thousand, nine hundred seventy-nine".