87147449 has 2 divisors, whose sum is σ = 87147450. Its totient is φ = 87147448.

The previous prime is 87147383. The next prime is 87147497. The reversal of 87147449 is 94474178.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55428025 + 31719424 = 7445^2 + 5632^2 .

It is a cyclic number.

It is not a de Polignac number, because 87147449 - 2¹⁶ = 87081913 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87141449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43573724 + 43573725.

It is an arithmetic number, because the mean of its divisors is an integer number (43573725).

Almost surely, 2^87147449 is an apocalyptic number.

It is an amenable number.

87147449 is a deficient number, since it is larger than the sum of its proper divisors (1).

87147449 is an equidigital number, since it uses as much as digits as its factorization.

87147449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 225792, while the sum is 44.

The square root of 87147449 is about 9335.2798029839. The cubic root of 87147449 is about 443.3549479101.

The spelling of 87147449 in words is "eighty-seven million, one hundred forty-seven thousand, four hundred forty-nine".