998437673 has 2 divisors, whose sum is σ = 998437674. Its totient is φ = 998437672.

The previous prime is 998437667. The next prime is 998437709. The reversal of 998437673 is 376734899.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 557101609 + 441336064 = 23603^2 + 21008^2 .

It is an emirp because it is prime and its reverse (376734899) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 998437673 - 2²⁴ = 981660457 is a prime.

It is not a weakly prime, because it can be changed into another prime (998437633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499218836 + 499218837.

It is an arithmetic number, because the mean of its divisors is an integer number (499218837).

Almost surely, 2^998437673 is an apocalyptic number.

It is an amenable number.

998437673 is a deficient number, since it is larger than the sum of its proper divisors (1).

998437673 is an equidigital number, since it uses as much as digits as its factorization.

998437673 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6858432, while the sum is 56.

The square root of 998437673 is about 31598.0643869209. The cubic root of 998437673 is about 999.4789528904.

The spelling of 998437673 in words is "nine hundred ninety-eight million, four hundred thirty-seven thousand, six hundred seventy-three".