87897149 has 2 divisors, whose sum is σ = 87897150. Its totient is φ = 87897148.

The previous prime is 87897143. The next prime is 87897151. The reversal of 87897149 is 94179878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86620249 + 1276900 = 9307^2 + 1130^2 .

It is a cyclic number.

It is not a de Polignac number, because 87897149 - 2⁴ = 87897133 is a prime.

Together with 87897151, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 87897149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87897143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43948574 + 43948575.

It is an arithmetic number, because the mean of its divisors is an integer number (43948575).

Almost surely, 2^87897149 is an apocalyptic number.

It is an amenable number.

87897149 is a deficient number, since it is larger than the sum of its proper divisors (1).

87897149 is an equidigital number, since it uses as much as digits as its factorization.

87897149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1016064, while the sum is 53.

The square root of 87897149 is about 9375.3479402100. The cubic root of 87897149 is about 444.6226637595.

The spelling of 87897149 in words is "eighty-seven million, eight hundred ninety-seven thousand, one hundred forty-nine".