87148447 has 2 divisors, whose sum is σ = 87148448. Its totient is φ = 87148446.

The previous prime is 87148361. The next prime is 87148489. The reversal of 87148447 is 74484178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87148447 - 2⁷ = 87148319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87148147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43574223 + 43574224.

It is an arithmetic number, because the mean of its divisors is an integer number (43574224).

Almost surely, 2^87148447 is an apocalyptic number.

87148447 is a deficient number, since it is larger than the sum of its proper divisors (1).

87148447 is an equidigital number, since it uses as much as digits as its factorization.

87148447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 200704, while the sum is 43.

The square root of 87148447 is about 9335.3332559690. Note that the first 3 decimals coincide. The cubic root of 87148447 is about 443.3566403159.

It can be divided in two parts, 8714 and 8447, that added together give a square (17161 = 131²).

The spelling of 87148447 in words is "eighty-seven million, one hundred forty-eight thousand, four hundred forty-seven".