998150771 has 2 divisors, whose sum is σ = 998150772. Its totient is φ = 998150770.

The previous prime is 998150759. The next prime is 998150821. The reversal of 998150771 is 177051899.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 998150771 - 2¹⁴ = 998134387 is a prime.

It is not a weakly prime, because it can be changed into another prime (998150071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499075385 + 499075386.

It is an arithmetic number, because the mean of its divisors is an integer number (499075386).

Almost surely, 2^998150771 is an apocalyptic number.

998150771 is a deficient number, since it is larger than the sum of its proper divisors (1).

998150771 is an equidigital number, since it uses as much as digits as its factorization.

998150771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158760, while the sum is 47.

The square root of 998150771 is about 31593.5241940496. The cubic root of 998150771 is about 999.3832099816.

The spelling of 998150771 in words is "nine hundred ninety-eight million, one hundred fifty thousand, seven hundred seventy-one".