199738031 has 4 divisors (see below), whose sum is σ = 201570600. Its totient is φ = 197905464.

The previous prime is 199737997. The next prime is 199738043. The reversal of 199738031 is 130837991.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130837991 = 157 ⋅833363.

It is a cyclic number.

It is not a de Polignac number, because 199738031 - 2¹⁴ = 199721647 is a prime.

It is a super-2 number, since 2×199738031² = 79790562055513922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 199738031.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199738061) 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, 916121 + ... + 916338.

It is an arithmetic number, because the mean of its divisors is an integer number (50392650).

Almost surely, 2^199738031 is an apocalyptic number.

199738031 is a deficient number, since it is larger than the sum of its proper divisors (1832569).

199738031 is a wasteful number, since it uses less digits than its factorization.

199738031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1832568.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 199738031 is about 14132.8705859779. The cubic root of 199738031 is about 584.5481020778.

The spelling of 199738031 in words is "one hundred ninety-nine million, seven hundred thirty-eight thousand, thirty-one".