36400643 has 2 divisors, whose sum is σ = 36400644. Its totient is φ = 36400642.

The previous prime is 36400633. The next prime is 36400667. The reversal of 36400643 is 34600463.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 36400643 - 2⁴ = 36400627 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (36400633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18200321 + 18200322.

It is an arithmetic number, because the mean of its divisors is an integer number (18200322).

Almost surely, 2^36400643 is an apocalyptic number.

36400643 is a deficient number, since it is larger than the sum of its proper divisors (1).

36400643 is an equidigital number, since it uses as much as digits as its factorization.

36400643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 36400643 is about 6033.2945394701. The cubic root of 36400643 is about 331.4131106984.

The spelling of 36400643 in words is "thirty-six million, four hundred thousand, six hundred forty-three".