87285773389 has 2 divisors, whose sum is σ = 87285773390. Its totient is φ = 87285773388.

The previous prime is 87285773363. The next prime is 87285773411. The reversal of 87285773389 is 98337758278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49617562500 + 37668210889 = 222750^2 + 194083^2 .

It is a cyclic number.

It is not a de Polignac number, because 87285773389 - 2⁵ = 87285773357 is a prime.

It is a super-2 number, since 2×87285773389² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87285773339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43642886694 + 43642886695.

It is an arithmetic number, because the mean of its divisors is an integer number (43642886695).

Almost surely, 2^87285773389 is an apocalyptic number.

It is an amenable number.

87285773389 is a deficient number, since it is larger than the sum of its proper divisors (1).

87285773389 is an equidigital number, since it uses as much as digits as its factorization.

87285773389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 142248960, while the sum is 67.

The spelling of 87285773389 in words is "eighty-seven billion, two hundred eighty-five million, seven hundred seventy-three thousand, three hundred eighty-nine".