198523037 has 2 divisors, whose sum is σ = 198523038. Its totient is φ = 198523036.

The previous prime is 198522983. The next prime is 198523049. The reversal of 198523037 is 730325891.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146192281 + 52330756 = 12091^2 + 7234^2 .

It is an emirp because it is prime and its reverse (730325891) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 198523037 - 2²⁰ = 197474461 is a prime.

It is a super-2 number, since 2×198523037² = 78822792439406738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198523057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99261518 + 99261519.

It is an arithmetic number, because the mean of its divisors is an integer number (99261519).

Almost surely, 2^198523037 is an apocalyptic number.

It is an amenable number.

198523037 is a deficient number, since it is larger than the sum of its proper divisors (1).

198523037 is an equidigital number, since it uses as much as digits as its factorization.

198523037 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 198523037 is about 14089.8203324244. The cubic root of 198523037 is about 583.3604340788.

The spelling of 198523037 in words is "one hundred ninety-eight million, five hundred twenty-three thousand, thirty-seven".