7913887 has 2 divisors, whose sum is σ = 7913888. Its totient is φ = 7913886.

The previous prime is 7913833. The next prime is 7913903. The reversal of 7913887 is 7883197.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7913887 is a prime.

It is a zygodrome in base 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7910887) 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 as a sum of consecutive naturals, namely, 3956943 + 3956944.

It is an arithmetic number, because the mean of its divisors is an integer number (3956944).

Almost surely, 2^7913887 is an apocalyptic number.

7913887 is a deficient number, since it is larger than the sum of its proper divisors (1).

7913887 is an equidigital number, since it uses as much as digits as its factorization.

7913887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 43.

The square root of 7913887 is about 2813.1631662596. The cubic root of 7913887 is about 199.2798013492.

The spelling of 7913887 in words is "seven million, nine hundred thirteen thousand, eight hundred eighty-seven".