87285904469 has 2 divisors, whose sum is σ = 87285904470. Its totient is φ = 87285904468.

The previous prime is 87285904451. The next prime is 87285904471. The reversal of 87285904469 is 96440958278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73902422500 + 13383481969 = 271850^2 + 115687^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87285904469 is a prime.

It is a super-2 number, since 2×87285904469² (a number of 23 digits) contains 22 as substring.

Together with 87285904471, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87285904369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43642952234 + 43642952235.

It is an arithmetic number, because the mean of its divisors is an integer number (43642952235).

Almost surely, 2^87285904469 is an apocalyptic number.

It is an amenable number.

87285904469 is a deficient number, since it is larger than the sum of its proper divisors (1).

87285904469 is an equidigital number, since it uses as much as digits as its factorization.

87285904469 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34836480, while the sum is 62.

The spelling of 87285904469 in words is "eighty-seven billion, two hundred eighty-five million, nine hundred four thousand, four hundred sixty-nine".