7920949 has 2 divisors, whose sum is σ = 7920950. Its totient is φ = 7920948.

The previous prime is 7920893. The next prime is 7920959. The reversal of 7920949 is 9490297.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7524049 + 396900 = 2743^2 + 630^2 .

It is a cyclic number.

It is not a de Polignac number, because 7920949 - 2⁷ = 7920821 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7920959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3960474 + 3960475.

It is an arithmetic number, because the mean of its divisors is an integer number (3960475).

Almost surely, 2^7920949 is an apocalyptic number.

It is an amenable number.

7920949 is a deficient number, since it is larger than the sum of its proper divisors (1).

7920949 is an equidigital number, since it uses as much as digits as its factorization.

7920949 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 7920949 is about 2814.4180570768. The cubic root of 7920949 is about 199.3390598634.

The spelling of 7920949 in words is "seven million, nine hundred twenty thousand, nine hundred forty-nine".