87654355991 has 2 divisors, whose sum is σ = 87654355992. Its totient is φ = 87654355990.

The previous prime is 87654355963. The next prime is 87654356051. The reversal of 87654355991 is 19955345678.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87654355991 is a prime.

It is a super-3 number, since 3×87654355991³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87654355291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43827177995 + 43827177996.

It is an arithmetic number, because the mean of its divisors is an integer number (43827177996).

Almost surely, 2^87654355991 is an apocalyptic number.

87654355991 is a deficient number, since it is larger than the sum of its proper divisors (1).

87654355991 is an equidigital number, since it uses as much as digits as its factorization.

87654355991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40824000, while the sum is 62.

The spelling of 87654355991 in words is "eighty-seven billion, six hundred fifty-four million, three hundred fifty-five thousand, nine hundred ninety-one".