199154043 has 12 divisors (see below), whose sum is σ = 313818648. Its totient is φ = 120699360.

The previous prime is 199154003. The next prime is 199154047. The reversal of 199154043 is 340451991.

It is a happy number.

It is not a de Polignac number, because 199154043 - 2¹⁶ = 199088507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199153989 and 199154007.

It is not an unprimeable number, because it can be changed into a prime (199154047) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1005730 + ... + 1005927.

It is an arithmetic number, because the mean of its divisors is an integer number (26151554).

Almost surely, 2^199154043 is an apocalyptic number.

199154043 is a deficient number, since it is larger than the sum of its proper divisors (114664605).

199154043 is a wasteful number, since it uses less digits than its factorization.

199154043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2011674 (or 2011671 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 199154043 is about 14112.1948328387. The cubic root of 199154043 is about 583.9778512820.

The spelling of 199154043 in words is "one hundred ninety-nine million, one hundred fifty-four thousand, forty-three".