198237407 has 2 divisors, whose sum is σ = 198237408. Its totient is φ = 198237406.

The previous prime is 198237383. The next prime is 198237409. The reversal of 198237407 is 704732891.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 198237407 - 2¹⁸ = 197975263 is a prime.

Together with 198237409, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198237409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99118703 + 99118704.

It is an arithmetic number, because the mean of its divisors is an integer number (99118704).

Almost surely, 2^198237407 is an apocalyptic number.

198237407 is a deficient number, since it is larger than the sum of its proper divisors (1).

198237407 is an equidigital number, since it uses as much as digits as its factorization.

198237407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 198237407 is about 14079.6806426850. The cubic root of 198237407 is about 583.0805249738.

The spelling of 198237407 in words is "one hundred ninety-eight million, two hundred thirty-seven thousand, four hundred seven".