198494901 has 32 divisors (see below), whose sum is σ = 322035840. Its totient is φ = 119836800.

The previous prime is 198494893. The next prime is 198494909. The reversal of 198494901 is 109494891.

It is an interprime number because it is at equal distance from previous prime (198494893) and next prime (198494909).

It is not a de Polignac number, because 198494901 - 2³ = 198494893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198494909) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 85881 + ... + 88161.

It is an arithmetic number, because the mean of its divisors is an integer number (10063620).

Almost surely, 2^198494901 is an apocalyptic number.

198494901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

198494901 is a deficient number, since it is larger than the sum of its proper divisors (123540939).

198494901 is a wasteful number, since it uses less digits than its factorization.

198494901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2594 (or 2588 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 45.

The square root of 198494901 is about 14088.8218457045. The cubic root of 198494901 is about 583.3328735416.

The spelling of 198494901 in words is "one hundred ninety-eight million, four hundred ninety-four thousand, nine hundred one".