7977131 has 8 divisors (see below), whose sum is σ = 8891280. Its totient is φ = 7112448.

The previous prime is 7977119. The next prime is 7977133. The reversal of 7977131 is 1317797.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7977131 is a prime.

It is a super-2 number, since 2×7977131² = 127269237982322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7977091 and 7977100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7977133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12026 + ... + 12671.

It is an arithmetic number, because the mean of its divisors is an integer number (1111410).

Almost surely, 2^7977131 is an apocalyptic number.

7977131 is a deficient number, since it is larger than the sum of its proper divisors (914149).

7977131 is a wasteful number, since it uses less digits than its factorization.

7977131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24733.

The product of its digits is 9261, while the sum is 35.

The square root of 7977131 is about 2824.3815252193. The cubic root of 7977131 is about 199.8092431169.

The spelling of 7977131 in words is "seven million, nine hundred seventy-seven thousand, one hundred thirty-one".