7998977 has 16 divisors (see below), whose sum is σ = 9580032. Its totient is φ = 6535680.

The previous prime is 7998971. The next prime is 7998979. The reversal of 7998977 is 7798997.

It is a cyclic number.

It is not a de Polignac number, because 7998977 - 2¹² = 7994881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7998971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13193 + ... + 13785.

It is an arithmetic number, because the mean of its divisors is an integer number (598752).

Almost surely, 2^7998977 is an apocalyptic number.

It is an amenable number.

7998977 is a deficient number, since it is larger than the sum of its proper divisors (1581055).

7998977 is a wasteful number, since it uses less digits than its factorization.

7998977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 688.

The product of its digits is 2000376, while the sum is 56.

The square root of 7998977 is about 2828.2462764052. The cubic root of 7998977 is about 199.9914746366.

The spelling of 7998977 in words is "seven million, nine hundred ninety-eight thousand, nine hundred seventy-seven".