36643441 has 2 divisors, whose sum is σ = 36643442. Its totient is φ = 36643440.

The previous prime is 36643429. The next prime is 36643469. The reversal of 36643441 is 14434663.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20070400 + 16573041 = 4480^2 + 4071^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36643441 is a prime.

It is not a weakly prime, because it can be changed into another prime (36643471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18321720 + 18321721.

It is an arithmetic number, because the mean of its divisors is an integer number (18321721).

Almost surely, 2^36643441 is an apocalyptic number.

It is an amenable number.

36643441 is a deficient number, since it is larger than the sum of its proper divisors (1).

36643441 is an equidigital number, since it uses as much as digits as its factorization.

36643441 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20736, while the sum is 31.

The square root of 36643441 is about 6053.3826080961. The cubic root of 36643441 is about 332.1483375693.

The spelling of 36643441 in words is "thirty-six million, six hundred forty-three thousand, four hundred forty-one".