36513989 has 2 divisors, whose sum is σ = 36513990. Its totient is φ = 36513988.

The previous prime is 36513973. The next prime is 36514013. The reversal of 36513989 is 98931563.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30991489 + 5522500 = 5567^2 + 2350^2 .

It is an emirp because it is prime and its reverse (98931563) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36513989 - 2⁴ = 36513973 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 (36513959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18256994 + 18256995.

It is an arithmetic number, because the mean of its divisors is an integer number (18256995).

Almost surely, 2^36513989 is an apocalyptic number.

It is an amenable number.

36513989 is a deficient number, since it is larger than the sum of its proper divisors (1).

36513989 is an equidigital number, since it uses as much as digits as its factorization.

36513989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 174960, while the sum is 44.

The square root of 36513989 is about 6042.6806137674. The cubic root of 36513989 is about 331.7567440776.

The spelling of 36513989 in words is "thirty-six million, five hundred thirteen thousand, nine hundred eighty-nine".