36213649 has 2 divisors, whose sum is σ = 36213650. Its totient is φ = 36213648.

The previous prime is 36213637. The next prime is 36213659. The reversal of 36213649 is 94631263.

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., 36084049 + 129600 = 6007^2 + 360^2 .

It is a cyclic number.

It is not a de Polignac number, because 36213649 - 2¹³ = 36205457 is a prime.

It is a super-4 number, since 4×36213649⁴ (a number of 31 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (36213629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18106824 + 18106825.

It is an arithmetic number, because the mean of its divisors is an integer number (18106825).

Almost surely, 2^36213649 is an apocalyptic number.

It is an amenable number.

36213649 is a deficient number, since it is larger than the sum of its proper divisors (1).

36213649 is an equidigital number, since it uses as much as digits as its factorization.

36213649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23328, while the sum is 34.

The square root of 36213649 is about 6017.7777459790. Note that the first 4 decimals coincide. The cubic root of 36213649 is about 330.8446346002.

The spelling of 36213649 in words is "thirty-six million, two hundred thirteen thousand, six hundred forty-nine".