7998129 has 24 divisors (see below), whose sum is σ = 12272480. Its totient is φ = 5145336.

The previous prime is 7998119. The next prime is 7998139. The reversal of 7998129 is 9218997.

It is an interprime number because it is at equal distance from previous prime (7998119) and next prime (7998139).

It is not a de Polignac number, because 7998129 - 2¹¹ = 7996081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7998119) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 96322 + ... + 96404.

Almost surely, 2^7998129 is an apocalyptic number.

It is an amenable number.

7998129 is a deficient number, since it is larger than the sum of its proper divisors (4274351).

7998129 is an equidigital number, since it uses as much as digits as its factorization.

7998129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 129 counting only the distinct ones).

The product of its digits is 81648, while the sum is 45.

The square root of 7998129 is about 2828.0963562085. The cubic root of 7998129 is about 199.9844071177.

The spelling of 7998129 in words is "seven million, nine hundred ninety-eight thousand, one hundred twenty-nine".