36571993 has 2 divisors, whose sum is σ = 36571994. Its totient is φ = 36571992.

The previous prime is 36571963. The next prime is 36572009. The reversal of 36571993 is 39917563.

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., 20866624 + 15705369 = 4568^2 + 3963^2 .

It is a cyclic number.

It is not a de Polignac number, because 36571993 - 2¹³ = 36563801 is a prime.

It is a nialpdrome in base 13.

It is not a weakly prime, because it can be changed into another prime (36571933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18285996 + 18285997.

It is an arithmetic number, because the mean of its divisors is an integer number (18285997).

Almost surely, 2^36571993 is an apocalyptic number.

It is an amenable number.

36571993 is a deficient number, since it is larger than the sum of its proper divisors (1).

36571993 is an equidigital number, since it uses as much as digits as its factorization.

36571993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 153090, while the sum is 43.

The square root of 36571993 is about 6047.4782347686. The cubic root of 36571993 is about 331.9323209651.

The spelling of 36571993 in words is "thirty-six million, five hundred seventy-one thousand, nine hundred ninety-three".