998626957 has 2 divisors, whose sum is σ = 998626958. Its totient is φ = 998626956.

The previous prime is 998626891. The next prime is 998626961. The reversal of 998626957 is 759626899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 990297961 + 8328996 = 31469^2 + 2886^2 .

It is a cyclic number.

It is not a de Polignac number, because 998626957 - 2¹¹ = 998624909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 998626895 and 998626904.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998626987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499313478 + 499313479.

It is an arithmetic number, because the mean of its divisors is an integer number (499313479).

Almost surely, 2^998626957 is an apocalyptic number.

It is an amenable number.

998626957 is a deficient number, since it is larger than the sum of its proper divisors (1).

998626957 is an equidigital number, since it uses as much as digits as its factorization.

998626957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14696640, while the sum is 61.

The square root of 998626957 is about 31601.0594284432. The cubic root of 998626957 is about 999.5421093682.

The spelling of 998626957 in words is "nine hundred ninety-eight million, six hundred twenty-six thousand, nine hundred fifty-seven".