998713057 has 2 divisors, whose sum is σ = 998713058. Its totient is φ = 998713056.

The previous prime is 998713043. The next prime is 998713087. The reversal of 998713057 is 750317899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 520022416 + 478690641 = 22804^2 + 21879^2 .

It is a cyclic number.

It is not a de Polignac number, because 998713057 - 2⁷ = 998712929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 998713057.

It is not a weakly prime, because it can be changed into another prime (998713087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499356528 + 499356529.

It is an arithmetic number, because the mean of its divisors is an integer number (499356529).

Almost surely, 2^998713057 is an apocalyptic number.

It is an amenable number.

998713057 is a deficient number, since it is larger than the sum of its proper divisors (1).

998713057 is an equidigital number, since it uses as much as digits as its factorization.

998713057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 476280, while the sum is 49.

The square root of 998713057 is about 31602.4216951803. The cubic root of 998713057 is about 999.5708348436.

The spelling of 998713057 in words is "nine hundred ninety-eight million, seven hundred thirteen thousand, fifty-seven".