87788551 has 2 divisors, whose sum is σ = 87788552. Its totient is φ = 87788550.

The previous prime is 87788549. The next prime is 87788557. The reversal of 87788551 is 15588778.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87788551 - 2¹ = 87788549 is a prime.

Together with 87788549, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 87788495 and 87788504.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87788557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43894275 + 43894276.

It is an arithmetic number, because the mean of its divisors is an integer number (43894276).

Almost surely, 2^87788551 is an apocalyptic number.

87788551 is a deficient number, since it is larger than the sum of its proper divisors (1).

87788551 is an equidigital number, since it uses as much as digits as its factorization.

87788551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 627200, while the sum is 49.

The square root of 87788551 is about 9369.5544717985. The cubic root of 87788551 is about 444.4394760533.

The spelling of 87788551 in words is "eighty-seven million, seven hundred eighty-eight thousand, five hundred fifty-one".