7887157 has 2 divisors, whose sum is σ = 7887158. Its totient is φ = 7887156.

The previous prime is 7887151. The next prime is 7887161. The reversal of 7887157 is 7517887.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5924356 + 1962801 = 2434^2 + 1401^2 .

It is a cyclic number.

It is not a de Polignac number, because 7887157 - 2³ = 7887149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7887151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3943578 + 3943579.

It is an arithmetic number, because the mean of its divisors is an integer number (3943579).

Almost surely, 2^7887157 is an apocalyptic number.

It is an amenable number.

7887157 is a deficient number, since it is larger than the sum of its proper divisors (1).

7887157 is an equidigital number, since it uses as much as digits as its factorization.

7887157 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109760, while the sum is 43.

The square root of 7887157 is about 2808.4082680408. The cubic root of 7887157 is about 199.0551853212.

The spelling of 7887157 in words is "seven million, eight hundred eighty-seven thousand, one hundred fifty-seven".