40638601 has 2 divisors, whose sum is σ = 40638602. Its totient is φ = 40638600.

The previous prime is 40638593. The next prime is 40638629. The reversal of 40638601 is 10683604.

It is an a-pointer prime, because the next prime (40638629) can be obtained adding 40638601 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36542025 + 4096576 = 6045^2 + 2024^2 .

It is a cyclic number.

It is not a de Polignac number, because 40638601 - 2³ = 40638593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40638601.

It is not a weakly prime, because it can be changed into another prime (40636601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20319300 + 20319301.

It is an arithmetic number, because the mean of its divisors is an integer number (20319301).

Almost surely, 2^40638601 is an apocalyptic number.

It is an amenable number.

40638601 is a deficient number, since it is larger than the sum of its proper divisors (1).

40638601 is an equidigital number, since it uses as much as digits as its factorization.

40638601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 40638601 is about 6374.8412529254. The cubic root of 40638601 is about 343.8055762042.

The spelling of 40638601 in words is "forty million, six hundred thirty-eight thousand, six hundred one".