86993953 has 2 divisors, whose sum is σ = 86993954. Its totient is φ = 86993952.

The previous prime is 86993911. The next prime is 86993983. The reversal of 86993953 is 35939968.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86992929 + 1024 = 9327^2 + 32^2 .

It is a cyclic number.

It is not a de Polignac number, because 86993953 - 2⁹ = 86993441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 86993953.

It is not a weakly prime, because it can be changed into another prime (86993983) 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, 43496976 + 43496977.

It is an arithmetic number, because the mean of its divisors is an integer number (43496977).

Almost surely, 2^86993953 is an apocalyptic number.

It is an amenable number.

86993953 is a deficient number, since it is larger than the sum of its proper divisors (1).

86993953 is an equidigital number, since it uses as much as digits as its factorization.

86993953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1574640, while the sum is 52.

The square root of 86993953 is about 9327.0548942311. The cubic root of 86993953 is about 443.0944958223.

The spelling of 86993953 in words is "eighty-six million, nine hundred ninety-three thousand, nine hundred fifty-three".