998554699 has 2 divisors, whose sum is σ = 998554700. Its totient is φ = 998554698.

The previous prime is 998554693. The next prime is 998554703. The reversal of 998554699 is 996455899.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998554699 - 2³ = 998554691 is a prime.

It is a super-2 number, since 2×998554699² = 1994222973789961202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 998554699.

It is not a weakly prime, because it can be changed into another prime (998554691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499277349 + 499277350.

It is an arithmetic number, because the mean of its divisors is an integer number (499277350).

Almost surely, 2^998554699 is an apocalyptic number.

998554699 is a deficient number, since it is larger than the sum of its proper divisors (1).

998554699 is an equidigital number, since it uses as much as digits as its factorization.

998554699 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31492800, while the sum is 64.

The square root of 998554699 is about 31599.9161233064. The cubic root of 998554699 is about 999.5180007140.

The spelling of 998554699 in words is "nine hundred ninety-eight million, five hundred fifty-four thousand, six hundred ninety-nine".