7863949 has 2 divisors, whose sum is σ = 7863950. Its totient is φ = 7863948.

The previous prime is 7863941. The next prime is 7863971. The reversal of 7863949 is 9493687.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6853924 + 1010025 = 2618^2 + 1005^2 .

It is a cyclic number.

It is not a de Polignac number, because 7863949 - 2³ = 7863941 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 7863899 and 7863908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7863941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3931974 + 3931975.

It is an arithmetic number, because the mean of its divisors is an integer number (3931975).

Almost surely, 2^7863949 is an apocalyptic number.

It is an amenable number.

7863949 is a deficient number, since it is larger than the sum of its proper divisors (1).

7863949 is an equidigital number, since it uses as much as digits as its factorization.

7863949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 46.

The square root of 7863949 is about 2804.2733461630. The cubic root of 7863949 is about 198.8597532071.

Subtracting from 7863949 its product of digits (326592), we obtain a palindrome (7537357).

The spelling of 7863949 in words is "seven million, eight hundred sixty-three thousand, nine hundred forty-nine".