198214537 has 2 divisors, whose sum is σ = 198214538. Its totient is φ = 198214536.

The previous prime is 198214487. The next prime is 198214573. The reversal of 198214537 is 735412891.

Together with next prime (198214573) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187580416 + 10634121 = 13696^2 + 3261^2 .

It is an emirp because it is prime and its reverse (735412891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198214537 - 2⁷ = 198214409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 198214537.

It is not a weakly prime, because it can be changed into another prime (198214937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99107268 + 99107269.

It is an arithmetic number, because the mean of its divisors is an integer number (99107269).

Almost surely, 2^198214537 is an apocalyptic number.

It is an amenable number.

198214537 is a deficient number, since it is larger than the sum of its proper divisors (1).

198214537 is an equidigital number, since it uses as much as digits as its factorization.

198214537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 198214537 is about 14078.8684559520. The cubic root of 198214537 is about 583.0581014150.

The spelling of 198214537 in words is "one hundred ninety-eight million, two hundred fourteen thousand, five hundred thirty-seven".