87319627469 has 2 divisors, whose sum is σ = 87319627470. Its totient is φ = 87319627468.

The previous prime is 87319627457. The next prime is 87319627547. The reversal of 87319627469 is 96472691378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 77472042244 + 9847585225 = 278338^2 + 99235^2 .

It is a cyclic number.

It is not a de Polignac number, because 87319627469 - 2⁴ = 87319627453 is a prime.

It is a super-2 number, since 2×87319627469² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87319627069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43659813734 + 43659813735.

It is an arithmetic number, because the mean of its divisors is an integer number (43659813735).

Almost surely, 2^87319627469 is an apocalyptic number.

It is an amenable number.

87319627469 is a deficient number, since it is larger than the sum of its proper divisors (1).

87319627469 is an equidigital number, since it uses as much as digits as its factorization.

87319627469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27433728, while the sum is 62.

The spelling of 87319627469 in words is "eighty-seven billion, three hundred nineteen million, six hundred twenty-seven thousand, four hundred sixty-nine".