87148261 has 2 divisors, whose sum is σ = 87148262. Its totient is φ = 87148260.

The previous prime is 87148253. The next prime is 87148279. The reversal of 87148261 is 16284178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84916225 + 2232036 = 9215^2 + 1494^2 .

It is a cyclic number.

It is not a de Polignac number, because 87148261 - 2³ = 87148253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87148261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87148211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43574130 + 43574131.

It is an arithmetic number, because the mean of its divisors is an integer number (43574131).

Almost surely, 2^87148261 is an apocalyptic number.

It is an amenable number.

87148261 is a deficient number, since it is larger than the sum of its proper divisors (1).

87148261 is an equidigital number, since it uses as much as digits as its factorization.

87148261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 37.

The square root of 87148261 is about 9335.3232938126. The cubic root of 87148261 is about 443.3563248985.

The spelling of 87148261 in words is "eighty-seven million, one hundred forty-eight thousand, two hundred sixty-one".