87188953 has 2 divisors, whose sum is σ = 87188954. Its totient is φ = 87188952.

The previous prime is 87188911. The next prime is 87188999. The reversal of 87188953 is 35988178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53699584 + 33489369 = 7328^2 + 5787^2 .

It is a cyclic number.

It is not a de Polignac number, because 87188953 - 2²¹ = 85091801 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87188897 and 87188906.

It is not a weakly prime, because it can be changed into another prime (87180953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43594476 + 43594477.

It is an arithmetic number, because the mean of its divisors is an integer number (43594477).

Almost surely, 2^87188953 is an apocalyptic number.

It is an amenable number.

87188953 is a deficient number, since it is larger than the sum of its proper divisors (1).

87188953 is an equidigital number, since it uses as much as digits as its factorization.

87188953 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 49.

The square root of 87188953 is about 9337.5025033464. The cubic root of 87188953 is about 443.4253193842.

It can be divided in two parts, 8718 and 8953, that added together give a palindrome (17671).

The spelling of 87188953 in words is "eighty-seven million, one hundred eighty-eight thousand, nine hundred fifty-three".