198832457 has 2 divisors, whose sum is σ = 198832458. Its totient is φ = 198832456.

The previous prime is 198832451. The next prime is 198832591. The reversal of 198832457 is 754238891.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197430601 + 1401856 = 14051^2 + 1184^2 .

It is a cyclic number.

It is not a de Polignac number, because 198832457 - 2¹⁰ = 198831433 is a prime.

It is not a weakly prime, because it can be changed into another prime (198832451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99416228 + 99416229.

It is an arithmetic number, because the mean of its divisors is an integer number (99416229).

Almost surely, 2^198832457 is an apocalyptic number.

It is an amenable number.

198832457 is a deficient number, since it is larger than the sum of its proper divisors (1).

198832457 is an equidigital number, since it uses as much as digits as its factorization.

198832457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 47.

The square root of 198832457 is about 14100.7963250307. The cubic root of 198832457 is about 583.6633538998.

The spelling of 198832457 in words is "one hundred ninety-eight million, eight hundred thirty-two thousand, four hundred fifty-seven".