998975479 has 2 divisors, whose sum is σ = 998975480. Its totient is φ = 998975478.

The previous prime is 998975449. The next prime is 998975489. The reversal of 998975479 is 974579899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998975479 - 2¹³ = 998967287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998975449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499487739 + 499487740.

It is an arithmetic number, because the mean of its divisors is an integer number (499487740).

Almost surely, 2^998975479 is an apocalyptic number.

998975479 is a deficient number, since it is larger than the sum of its proper divisors (1).

998975479 is an equidigital number, since it uses as much as digits as its factorization.

998975479 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51438240, while the sum is 67.

The square root of 998975479 is about 31606.5733511243. The cubic root of 998975479 is about 999.6583763065.

The spelling of 998975479 in words is "nine hundred ninety-eight million, nine hundred seventy-five thousand, four hundred seventy-nine".