199977742 has 8 divisors (see below), whose sum is σ = 300036600. Its totient is φ = 99965544.

The previous prime is 199977737. The next prime is 199977773. The reversal of 199977742 is 247779991.

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

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2484 + ... + 20152.

It is an arithmetic number, because the mean of its divisors is an integer number (37504575).

Almost surely, 2^199977742 is an apocalyptic number.

199977742 is a deficient number, since it is larger than the sum of its proper divisors (100058858).

199977742 is a wasteful number, since it uses less digits than its factorization.

199977742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23330.

The product of its digits is 2000376, while the sum is 55.

The square root of 199977742 is about 14141.3486626983. The cubic root of 199977742 is about 584.7818525755.

The spelling of 199977742 in words is "one hundred ninety-nine million, nine hundred seventy-seven thousand, seven hundred forty-two".