198737493 has 8 divisors (see below), whose sum is σ = 274120800. Its totient is φ = 127922928.

The previous prime is 198737491. The next prime is 198737509. The reversal of 198737493 is 394737891.

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

It is not a de Polignac number, because 198737493 - 2¹ = 198737491 is a prime.

It is a super-2 number, since 2×198737493² = 78993182247850098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198737491) 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, 1142083 + ... + 1142256.

It is an arithmetic number, because the mean of its divisors is an integer number (34265100).

Almost surely, 2^198737493 is an apocalyptic number.

It is an amenable number.

198737493 is a deficient number, since it is larger than the sum of its proper divisors (75383307).

198737493 is a wasteful number, since it uses less digits than its factorization.

198737493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284371.

The product of its digits is 1143072, while the sum is 51.

The square root of 198737493 is about 14097.4285953148. The cubic root of 198737493 is about 583.5704183130.

The spelling of 198737493 in words is "one hundred ninety-eight million, seven hundred thirty-seven thousand, four hundred ninety-three".