7977313 has 4 divisors (see below), whose sum is σ = 8017600. Its totient is φ = 7937028.

The previous prime is 7977293. The next prime is 7977353. The reversal of 7977313 is 3137797.

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 not a de Polignac number, because 7977313 - 2¹³ = 7969121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7977353) 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, 19845 + ... + 20242.

It is an arithmetic number, because the mean of its divisors is an integer number (2004400).

Almost surely, 2^7977313 is an apocalyptic number.

It is an amenable number.

7977313 is a deficient number, since it is larger than the sum of its proper divisors (40287).

7977313 is a wasteful number, since it uses less digits than its factorization.

7977313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40286.

The product of its digits is 27783, while the sum is 37.

The square root of 7977313 is about 2824.4137444787. The cubic root of 7977313 is about 199.8107626693.

The spelling of 7977313 in words is "seven million, nine hundred seventy-seven thousand, three hundred thirteen".