199879151 has 2 divisors, whose sum is σ = 199879152. Its totient is φ = 199879150.

The previous prime is 199879117. The next prime is 199879171. The reversal of 199879151 is 151978991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199879151 - 2⁶ = 199879087 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 199879151.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199879111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99939575 + 99939576.

It is an arithmetic number, because the mean of its divisors is an integer number (99939576).

Almost surely, 2^199879151 is an apocalyptic number.

199879151 is a deficient number, since it is larger than the sum of its proper divisors (1).

199879151 is an equidigital number, since it uses as much as digits as its factorization.

199879151 is an evil number, because the sum of its binary digits is even.

The product of its digits is 204120, while the sum is 50.

The square root of 199879151 is about 14137.8623207329. The cubic root of 199879151 is about 584.6857357037.

The spelling of 199879151 in words is "one hundred ninety-nine million, eight hundred seventy-nine thousand, one hundred fifty-one".