36520391 has 2 divisors, whose sum is σ = 36520392. Its totient is φ = 36520390.

The previous prime is 36520361. The next prime is 36520423. The reversal of 36520391 is 19302563.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 36520391 - 2¹⁰ = 36519367 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36520361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18260195 + 18260196.

It is an arithmetic number, because the mean of its divisors is an integer number (18260196).

Almost surely, 2^36520391 is an apocalyptic number.

36520391 is a deficient number, since it is larger than the sum of its proper divisors (1).

36520391 is an equidigital number, since it uses as much as digits as its factorization.

36520391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 29.

The square root of 36520391 is about 6043.2103223370. The cubic root of 36520391 is about 331.7761319216.

The spelling of 36520391 in words is "thirty-six million, five hundred twenty thousand, three hundred ninety-one".