86627551 has 2 divisors, whose sum is σ = 86627552. Its totient is φ = 86627550.

The previous prime is 86627543. The next prime is 86627581. The reversal of 86627551 is 15572668.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 86627551 - 2³ = 86627543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (86627581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43313775 + 43313776.

It is an arithmetic number, because the mean of its divisors is an integer number (43313776).

Almost surely, 2^86627551 is an apocalyptic number.

86627551 is a deficient number, since it is larger than the sum of its proper divisors (1).

86627551 is an equidigital number, since it uses as much as digits as its factorization.

86627551 is an evil number, because the sum of its binary digits is even.

The product of its digits is 100800, while the sum is 40.

The square root of 86627551 is about 9307.3922771096. The cubic root of 86627551 is about 442.4715438094.

It can be divided in two parts, 86627 and 551, that added together give a palindrome (87178).

The spelling of 86627551 in words is "eighty-six million, six hundred twenty-seven thousand, five hundred fifty-one".