36169921 has 2 divisors, whose sum is σ = 36169922. Its totient is φ = 36169920.

The previous prime is 36169919. The next prime is 36169927. The reversal of 36169921 is 12996163.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35569296 + 600625 = 5964^2 + 775^2 .

It is an emirp because it is prime and its reverse (12996163) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 36169921 - 2¹ = 36169919 is a prime.

Together with 36169919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (36169927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18084960 + 18084961.

It is an arithmetic number, because the mean of its divisors is an integer number (18084961).

Almost surely, 2^36169921 is an apocalyptic number.

It is an amenable number.

36169921 is a deficient number, since it is larger than the sum of its proper divisors (1).

36169921 is an equidigital number, since it uses as much as digits as its factorization.

36169921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17496, while the sum is 37.

The square root of 36169921 is about 6014.1434136542. The cubic root of 36169921 is about 330.7114159425.

The spelling of 36169921 in words is "thirty-six million, one hundred sixty-nine thousand, nine hundred twenty-one".