887187493 has 2 divisors, whose sum is σ = 887187494. Its totient is φ = 887187492.

The previous prime is 887187491. The next prime is 887187503. The reversal of 887187493 is 394781788.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 836250724 + 50936769 = 28918^2 + 7137^2 .

It is a cyclic number.

It is not a de Polignac number, because 887187493 - 2¹ = 887187491 is a prime.

Together with 887187491, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (887187491) 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, 443593746 + 443593747.

It is an arithmetic number, because the mean of its divisors is an integer number (443593747).

Almost surely, 2^887187493 is an apocalyptic number.

It is an amenable number.

887187493 is a deficient number, since it is larger than the sum of its proper divisors (1).

887187493 is an equidigital number, since it uses as much as digits as its factorization.

887187493 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2709504, while the sum is 55.

The square root of 887187493 is about 29785.6927567582. The cubic root of 887187493 is about 960.8858623476.

The spelling of 887187493 in words is "eight hundred eighty-seven million, one hundred eighty-seven thousand, four hundred ninety-three".