199487371 has 2 divisors, whose sum is σ = 199487372. Its totient is φ = 199487370.

The previous prime is 199487329. The next prime is 199487381. The reversal of 199487371 is 173784991.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 199487371 - 2¹¹ = 199485323 is a prime.

It is a super-2 number, since 2×199487371² = 79590422376983282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (199487311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99743685 + 99743686.

It is an arithmetic number, because the mean of its divisors is an integer number (99743686).

Almost surely, 2^199487371 is an apocalyptic number.

199487371 is a deficient number, since it is larger than the sum of its proper divisors (1).

199487371 is an equidigital number, since it uses as much as digits as its factorization.

199487371 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024, while the sum is 49.

The square root of 199487371 is about 14123.9998229963. Note that the first 3 decimals coincide. The cubic root of 199487371 is about 584.3034747161.

The spelling of 199487371 in words is "one hundred ninety-nine million, four hundred eighty-seven thousand, three hundred seventy-one".