87945061 has 2 divisors, whose sum is σ = 87945062. Its totient is φ = 87945060.

The previous prime is 87945059. The next prime is 87945079. The reversal of 87945061 is 16054978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86304100 + 1640961 = 9290^2 + 1281^2 .

It is a cyclic number.

It is not a de Polignac number, because 87945061 - 2¹ = 87945059 is a prime.

Together with 87945059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87945001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43972530 + 43972531.

It is an arithmetic number, because the mean of its divisors is an integer number (43972531).

Almost surely, 2^87945061 is an apocalyptic number.

It is an amenable number.

87945061 is a deficient number, since it is larger than the sum of its proper divisors (1).

87945061 is an equidigital number, since it uses as much as digits as its factorization.

87945061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 87945061 is about 9377.9028039322. The cubic root of 87945061 is about 444.7034357823.

The spelling of 87945061 in words is "eighty-seven million, nine hundred forty-five thousand, sixty-one".