7997949 has 6 divisors (see below), whose sum is σ = 11552606. Its totient is φ = 5331960.

The previous prime is 7997947. The next prime is 7997959. The reversal of 7997949 is 9497997.

It can be written as a sum of positive squares in only one way, i.e., 7601049 + 396900 = 2757^2 + 630^2 .

It is not a de Polignac number, because 7997949 - 2¹ = 7997947 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7997895 and 7997904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7997947) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 444322 + ... + 444339.

Almost surely, 2^7997949 is an apocalyptic number.

It is an amenable number.

7997949 is a deficient number, since it is larger than the sum of its proper divisors (3554657).

7997949 is a wasteful number, since it uses less digits than its factorization.

7997949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888667 (or 888664 counting only the distinct ones).

The product of its digits is 1285956, while the sum is 54.

The square root of 7997949 is about 2828.0645325028. The cubic root of 7997949 is about 199.9829068725.

The spelling of 7997949 in words is "seven million, nine hundred ninety-seven thousand, nine hundred forty-nine".