198071437 has 8 divisors (see below), whose sum is σ = 213278400. Its totient is φ = 183259584.

The previous prime is 198071399. The next prime is 198071473. The reversal of 198071437 is 734170891.

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 198071437 - 2⁷ = 198071309 is a prime.

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 198071437.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198071737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97737 + ... + 99742.

It is an arithmetic number, because the mean of its divisors is an integer number (26659800).

Almost surely, 2^198071437 is an apocalyptic number.

198071437 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

198071437 is a deficient number, since it is larger than the sum of its proper divisors (15206963).

198071437 is a wasteful number, since it uses less digits than its factorization.

198071437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197555.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 198071437 is about 14073.7854538145. The cubic root of 198071437 is about 582.9177556693.

The spelling of 198071437 in words is "one hundred ninety-eight million, seventy-one thousand, four hundred thirty-seven".