93687989 has 2 divisors, whose sum is σ = 93687990. Its totient is φ = 93687988.

The previous prime is 93687973. The next prime is 93688051. The reversal of 93687989 is 98978639.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 81902500 + 11785489 = 9050^2 + 3433^2 .

It is an emirp because it is prime and its reverse (98978639) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 93687989 - 2⁴ = 93687973 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (93687389) 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, 46843994 + 46843995.

It is an arithmetic number, because the mean of its divisors is an integer number (46843995).

Almost surely, 2^93687989 is an apocalyptic number.

It is an amenable number.

93687989 is a deficient number, since it is larger than the sum of its proper divisors (1).

93687989 is an equidigital number, since it uses as much as digits as its factorization.

93687989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5878656, while the sum is 59.

The square root of 93687989 is about 9679.2556015429. The cubic root of 93687989 is about 454.1799648137.

The spelling of 93687989 in words is "ninety-three million, six hundred eighty-seven thousand, nine hundred eighty-nine".