998275639 has 2 divisors, whose sum is σ = 998275640. Its totient is φ = 998275638.

The previous prime is 998275589. The next prime is 998275669. The reversal of 998275639 is 936572899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998275639 - 2¹³ = 998267447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998275669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499137819 + 499137820.

It is an arithmetic number, because the mean of its divisors is an integer number (499137820).

Almost surely, 2^998275639 is an apocalyptic number.

998275639 is a deficient number, since it is larger than the sum of its proper divisors (1).

998275639 is an equidigital number, since it uses as much as digits as its factorization.

998275639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7348320, while the sum is 58.

The square root of 998275639 is about 31595.5002967195. The cubic root of 998275639 is about 999.4248823030.

The spelling of 998275639 in words is "nine hundred ninety-eight million, two hundred seventy-five thousand, six hundred thirty-nine".