998111077 has 2 divisors, whose sum is σ = 998111078. Its totient is φ = 998111076.

The previous prime is 998111063. The next prime is 998111111. The reversal of 998111077 is 770111899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 713210436 + 284900641 = 26706^2 + 16879^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-998111077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998111027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499055538 + 499055539.

It is an arithmetic number, because the mean of its divisors is an integer number (499055539).

Almost surely, 2^998111077 is an apocalyptic number.

It is an amenable number.

998111077 is a deficient number, since it is larger than the sum of its proper divisors (1).

998111077 is an equidigital number, since it uses as much as digits as its factorization.

998111077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 43.

The square root of 998111077 is about 31592.8959894467. The cubic root of 998111077 is about 999.3699621357.

The spelling of 998111077 in words is "nine hundred ninety-eight million, one hundred eleven thousand, seventy-seven".