199931407 has 8 divisors (see below), whose sum is σ = 227976336. Its totient is φ = 173695872.

The previous prime is 199931393. The next prime is 199931437. The reversal of 199931407 is 704139991.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 199931407 - 2¹⁹ = 199407119 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 (199931437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 452113 + ... + 452554.

It is an arithmetic number, because the mean of its divisors is an integer number (28497042).

Almost surely, 2^199931407 is an apocalyptic number.

199931407 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

199931407 is a deficient number, since it is larger than the sum of its proper divisors (28044929).

199931407 is a wasteful number, since it uses less digits than its factorization.

199931407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904697.

The product of its (nonzero) digits is 61236, while the sum is 43.

The square root of 199931407 is about 14139.7102869896. The cubic root of 199931407 is about 584.7366842818.

The spelling of 199931407 in words is "one hundred ninety-nine million, nine hundred thirty-one thousand, four hundred seven".