998170801 has 2 divisors, whose sum is σ = 998170802. Its totient is φ = 998170800.

The previous prime is 998170787. The next prime is 998170841. The reversal of 998170801 is 108071899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 813618576 + 184552225 = 28524^2 + 13585^2 .

It is a cyclic number.

It is not a de Polignac number, because 998170801 - 2¹³ = 998162609 is a prime.

It is not a weakly prime, because it can be changed into another prime (998170841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499085400 + 499085401.

It is an arithmetic number, because the mean of its divisors is an integer number (499085401).

Almost surely, 2^998170801 is an apocalyptic number.

It is an amenable number.

998170801 is a deficient number, since it is larger than the sum of its proper divisors (1).

998170801 is an equidigital number, since it uses as much as digits as its factorization.

998170801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 43.

The square root of 998170801 is about 31593.8411878011. The cubic root of 998170801 is about 999.3898948474.

The spelling of 998170801 in words is "nine hundred ninety-eight million, one hundred seventy thousand, eight hundred one".