199427477 has 4 divisors (see below), whose sum is σ = 209923680. Its totient is φ = 188931276.

The previous prime is 199427387. The next prime is 199427489. The reversal of 199427477 is 774724991.

199427477 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 774724991 = 9133 ⋅84827.

It is a cyclic number.

It is not a de Polignac number, because 199427477 - 2¹² = 199423381 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199427177) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5248073 + ... + 5248110.

It is an arithmetic number, because the mean of its divisors is an integer number (52480920).

Almost surely, 2^199427477 is an apocalyptic number.

It is an amenable number.

199427477 is a deficient number, since it is larger than the sum of its proper divisors (10496203).

199427477 is a wasteful number, since it uses less digits than its factorization.

199427477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10496202.

The product of its digits is 889056, while the sum is 50.

The square root of 199427477 is about 14121.8793720949. The cubic root of 199427477 is about 584.2449918571.

The spelling of 199427477 in words is "one hundred ninety-nine million, four hundred twenty-seven thousand, four hundred seventy-seven".