87251920699 has 2 divisors, whose sum is σ = 87251920700. Its totient is φ = 87251920698.

The previous prime is 87251920673. The next prime is 87251920801. The reversal of 87251920699 is 99602915278.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87251920699 - 2⁷ = 87251920571 is a prime.

It is a super-2 number, since 2×87251920699² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87251930699) 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, 43625960349 + 43625960350.

It is an arithmetic number, because the mean of its divisors is an integer number (43625960350).

Almost surely, 2^87251920699 is an apocalyptic number.

87251920699 is a deficient number, since it is larger than the sum of its proper divisors (1).

87251920699 is an equidigital number, since it uses as much as digits as its factorization.

87251920699 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 87251920699 in words is "eighty-seven billion, two hundred fifty-one million, nine hundred twenty thousand, six hundred ninety-nine".