199484947 has 2 divisors, whose sum is σ = 199484948. Its totient is φ = 199484946.

The previous prime is 199484927. The next prime is 199484977. The reversal of 199484947 is 749484991.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 199484947 - 2²⁷ = 65267219 is a prime.

It is not a weakly prime, because it can be changed into another prime (199484917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99742473 + 99742474.

It is an arithmetic number, because the mean of its divisors is an integer number (99742474).

Almost surely, 2^199484947 is an apocalyptic number.

199484947 is a deficient number, since it is larger than the sum of its proper divisors (1).

199484947 is an equidigital number, since it uses as much as digits as its factorization.

199484947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2612736, while the sum is 55.

The square root of 199484947 is about 14123.9140113497. The cubic root of 199484947 is about 584.3011080544.

The spelling of 199484947 in words is "one hundred ninety-nine million, four hundred eighty-four thousand, nine hundred forty-seven".