36809791 has 2 divisors, whose sum is σ = 36809792. Its totient is φ = 36809790.

The previous prime is 36809761. The next prime is 36809797. The reversal of 36809791 is 19790863.

It is a strong prime.

It is an emirp because it is prime and its reverse (19790863) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36809791 - 2¹⁹ = 36285503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36809797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18404895 + 18404896.

It is an arithmetic number, because the mean of its divisors is an integer number (18404896).

Almost surely, 2^36809791 is an apocalyptic number.

36809791 is a deficient number, since it is larger than the sum of its proper divisors (1).

36809791 is an equidigital number, since it uses as much as digits as its factorization.

36809791 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 36809791 is about 6067.1073008477. The cubic root of 36809791 is about 332.6501961494.

The spelling of 36809791 in words is "thirty-six million, eight hundred nine thousand, seven hundred ninety-one".