87061489 has 2 divisors, whose sum is σ = 87061490. Its totient is φ = 87061488.

The previous prime is 87061453. The next prime is 87061529. The reversal of 87061489 is 98416078.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84033889 + 3027600 = 9167^2 + 1740^2 .

It is a cyclic number.

It is not a de Polignac number, because 87061489 - 2⁹ = 87060977 is a prime.

It is not a weakly prime, because it can be changed into another prime (87061789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43530744 + 43530745.

It is an arithmetic number, because the mean of its divisors is an integer number (43530745).

Almost surely, 2^87061489 is an apocalyptic number.

It is an amenable number.

87061489 is a deficient number, since it is larger than the sum of its proper divisors (1).

87061489 is an equidigital number, since it uses as much as digits as its factorization.

87061489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96768, while the sum is 43.

The square root of 87061489 is about 9330.6746272711. The cubic root of 87061489 is about 443.2091286534.

The spelling of 87061489 in words is "eighty-seven million, sixty-one thousand, four hundred eighty-nine".