40804237 has 2 divisors, whose sum is σ = 40804238. Its totient is φ = 40804236.

The previous prime is 40804213. The next prime is 40804243. The reversal of 40804237 is 73240804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25664356 + 15139881 = 5066^2 + 3891^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40804237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40804207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20402118 + 20402119.

It is an arithmetic number, because the mean of its divisors is an integer number (20402119).

Almost surely, 2^40804237 is an apocalyptic number.

It is an amenable number.

40804237 is a deficient number, since it is larger than the sum of its proper divisors (1).

40804237 is an equidigital number, since it uses as much as digits as its factorization.

40804237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 28.

The square root of 40804237 is about 6387.8194244985. The cubic root of 40804237 is about 344.2720406457.

It can be divided in two parts, 40804 and 237, that added together give a triangular number (41041 = T₂₈₆).

The spelling of 40804237 in words is "forty million, eight hundred four thousand, two hundred thirty-seven".