198179797 has 2 divisors, whose sum is σ = 198179798. Its totient is φ = 198179796.

The previous prime is 198179791. The next prime is 198179803. The reversal of 198179797 is 797971891.

It is a balanced prime because it is at equal distance from previous prime (198179791) and next prime (198179803).

It can be written as a sum of positive squares in only one way, i.e., 144216081 + 53963716 = 12009^2 + 7346^2 .

It is a cyclic number.

It is not a de Polignac number, because 198179797 - 2⁷ = 198179669 is a prime.

It is a super-2 number, since 2×198179797² = 78550463877922418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (198179791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99089898 + 99089899.

It is an arithmetic number, because the mean of its divisors is an integer number (99089899).

Almost surely, 2^198179797 is an apocalyptic number.

It is an amenable number.

198179797 is a deficient number, since it is larger than the sum of its proper divisors (1).

198179797 is an equidigital number, since it uses as much as digits as its factorization.

198179797 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000376, while the sum is 58.

The square root of 198179797 is about 14077.6346379639. The cubic root of 198179797 is about 583.0240362682.

The spelling of 198179797 in words is "one hundred ninety-eight million, one hundred seventy-nine thousand, seven hundred ninety-seven".