36781729 has 2 divisors, whose sum is σ = 36781730. Its totient is φ = 36781728.

The previous prime is 36781711. The next prime is 36781733. The reversal of 36781729 is 92718763.

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., 35224225 + 1557504 = 5935^2 + 1248^2 .

It is a cyclic number.

It is not a de Polignac number, because 36781729 - 2⁵ = 36781697 is a prime.

It is not a weakly prime, because it can be changed into another prime (36781709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18390864 + 18390865.

It is an arithmetic number, because the mean of its divisors is an integer number (18390865).

Almost surely, 2^36781729 is an apocalyptic number.

It is an amenable number.

36781729 is a deficient number, since it is larger than the sum of its proper divisors (1).

36781729 is an equidigital number, since it uses as much as digits as its factorization.

36781729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 127008, while the sum is 43.

The square root of 36781729 is about 6064.7942256931. The cubic root of 36781729 is about 332.5656425320.

The spelling of 36781729 in words is "thirty-six million, seven hundred eighty-one thousand, seven hundred twenty-nine".