7998877 has 4 divisors (see below), whose sum is σ = 8076640. Its totient is φ = 7921116.

The previous prime is 7998863. The next prime is 7998937. The reversal of 7998877 is 7788997.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7998877 is a prime.

It is a super-2 number, since 2×7998877² = 127964066522258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7998827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38727 + ... + 38932.

It is an arithmetic number, because the mean of its divisors is an integer number (2019160).

Almost surely, 2^7998877 is an apocalyptic number.

It is an amenable number.

7998877 is a deficient number, since it is larger than the sum of its proper divisors (77763).

7998877 is a wasteful number, since it uses less digits than its factorization.

7998877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77762.

The product of its digits is 1778112, while the sum is 55.

The square root of 7998877 is about 2828.2285975501. The cubic root of 7998877 is about 199.9906412287.

The spelling of 7998877 in words is "seven million, nine hundred ninety-eight thousand, eight hundred seventy-seven".