998667029 has 2 divisors, whose sum is σ = 998667030. Its totient is φ = 998667028.

The previous prime is 998667017. The next prime is 998667031. The reversal of 998667029 is 920766899.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 633780625 + 364886404 = 25175^2 + 19102^2 .

It is a cyclic number.

It is not a de Polignac number, because 998667029 - 2²⁸ = 730231573 is a prime.

Together with 998667031, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (998667049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499333514 + 499333515.

It is an arithmetic number, because the mean of its divisors is an integer number (499333515).

Almost surely, 2^998667029 is an apocalyptic number.

It is an amenable number.

998667029 is a deficient number, since it is larger than the sum of its proper divisors (1).

998667029 is an equidigital number, since it uses as much as digits as its factorization.

998667029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2939328, while the sum is 56.

The square root of 998667029 is about 31601.6934514592. The cubic root of 998667029 is about 999.5554787635. Note that the first 3 decimals are identical.

The spelling of 998667029 in words is "nine hundred ninety-eight million, six hundred sixty-seven thousand, twenty-nine".