199044431 has 2 divisors, whose sum is σ = 199044432. Its totient is φ = 199044430.

The previous prime is 199044409. The next prime is 199044479. The reversal of 199044431 is 134440991.

It is a weak prime.

It is an emirp because it is prime and its reverse (134440991) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 199044431 - 2⁶ = 199044367 is a prime.

It is a super-2 number, since 2×199044431² = 79237371024227522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 199044391 and 199044400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (199044401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99522215 + 99522216.

It is an arithmetic number, because the mean of its divisors is an integer number (99522216).

Almost surely, 2^199044431 is an apocalyptic number.

199044431 is a deficient number, since it is larger than the sum of its proper divisors (1).

199044431 is an equidigital number, since it uses as much as digits as its factorization.

199044431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 199044431 is about 14108.3107068139. The cubic root of 199044431 is about 583.8706934818.

The spelling of 199044431 in words is "one hundred ninety-nine million, forty-four thousand, four hundred thirty-one".