199925069 has 2 divisors, whose sum is σ = 199925070. Its totient is φ = 199925068.

The previous prime is 199925053. The next prime is 199925123. The reversal of 199925069 is 960529991.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199883044 + 42025 = 14138^2 + 205^2 .

It is a cyclic number.

It is not a de Polignac number, because 199925069 - 2⁴ = 199925053 is a prime.

It is a super-2 number, since 2×199925069² = 79940066429309522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199925569) 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, 99962534 + 99962535.

It is an arithmetic number, because the mean of its divisors is an integer number (99962535).

Almost surely, 2^199925069 is an apocalyptic number.

It is an amenable number.

199925069 is a deficient number, since it is larger than the sum of its proper divisors (1).

199925069 is an equidigital number, since it uses as much as digits as its factorization.

199925069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 393660, while the sum is 50.

The square root of 199925069 is about 14139.4861646384. The cubic root of 199925069 is about 584.7305053289.

The spelling of 199925069 in words is "one hundred ninety-nine million, nine hundred twenty-five thousand, sixty-nine".