40487801 has 2 divisors, whose sum is σ = 40487802. Its totient is φ = 40487800.

The previous prime is 40487789. The next prime is 40487819. The reversal of 40487801 is 10878404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37515625 + 2972176 = 6125^2 + 1724^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40487801 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40487851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20243900 + 20243901.

It is an arithmetic number, because the mean of its divisors is an integer number (20243901).

Almost surely, 2^40487801 is an apocalyptic number.

It is an amenable number.

40487801 is a deficient number, since it is larger than the sum of its proper divisors (1).

40487801 is an equidigital number, since it uses as much as digits as its factorization.

40487801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 40487801 is about 6363.0025145367. The cubic root of 40487801 is about 343.3797893800.

Subtracting from 40487801 its sum of digits (32), we obtain a square (40487769 = 6363²).

The spelling of 40487801 in words is "forty million, four hundred eighty-seven thousand, eight hundred one".