36640447 has 2 divisors, whose sum is σ = 36640448. Its totient is φ = 36640446.

The previous prime is 36640399. The next prime is 36640451. The reversal of 36640447 is 74404663.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 36640447 - 2⁷ = 36640319 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36640847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18320223 + 18320224.

It is an arithmetic number, because the mean of its divisors is an integer number (18320224).

Almost surely, 2^36640447 is an apocalyptic number.

36640447 is a deficient number, since it is larger than the sum of its proper divisors (1).

36640447 is an equidigital number, since it uses as much as digits as its factorization.

36640447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 34.

The square root of 36640447 is about 6053.1353032953. The cubic root of 36640447 is about 332.1392911190.

The spelling of 36640447 in words is "thirty-six million, six hundred forty thousand, four hundred forty-seven".