198293997 has 16 divisors (see below), whose sum is σ = 288671040. Its totient is φ = 120076800.

The previous prime is 198293993. The next prime is 198294023. The reversal of 198293997 is 799392891.

It is not a de Polignac number, because 198293997 - 2² = 198293993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198293993) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60747 + ... + 63927.

It is an arithmetic number, because the mean of its divisors is an integer number (18041940).

Almost surely, 2^198293997 is an apocalyptic number.

It is an amenable number.

198293997 is a deficient number, since it is larger than the sum of its proper divisors (90377043).

198293997 is a wasteful number, since it uses less digits than its factorization.

198293997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5084.

The product of its digits is 2204496, while the sum is 57.

The square root of 198293997 is about 14081.6901329350. The cubic root of 198293997 is about 583.1360028780.

It can be divided in two parts, 1982939 and 97, that added together give a triangular number (1983036 = T₁₉₉₁).

The spelling of 198293997 in words is "one hundred ninety-eight million, two hundred ninety-three thousand, nine hundred ninety-seven".