36401609 has 4 divisors (see below), whose sum is σ = 36415104. Its totient is φ = 36388116.

The previous prime is 36401597. The next prime is 36401627. The reversal of 36401609 is 90610463.

36401609 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 36401609 - 2¹⁶ = 36336073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (36401009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157 + ... + 8610.

It is an arithmetic number, because the mean of its divisors is an integer number (9103776).

Almost surely, 2^36401609 is an apocalyptic number.

It is an amenable number.

36401609 is a deficient number, since it is larger than the sum of its proper divisors (13495).

36401609 is an equidigital number, since it uses as much as digits as its factorization.

36401609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13494.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 36401609 is about 6033.3745947024. The cubic root of 36401609 is about 331.4160423520.

The spelling of 36401609 in words is "thirty-six million, four hundred one thousand, six hundred nine".