40990237 has 2 divisors, whose sum is σ = 40990238. Its totient is φ = 40990236.

The previous prime is 40990211. The next prime is 40990249. The reversal of 40990237 is 73209904.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28451556 + 12538681 = 5334^2 + 3541^2 .

It is a cyclic number.

It is not a de Polignac number, because 40990237 - 2²³ = 32601629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40996237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20495118 + 20495119.

It is an arithmetic number, because the mean of its divisors is an integer number (20495119).

Almost surely, 2^40990237 is an apocalyptic number.

It is an amenable number.

40990237 is a deficient number, since it is larger than the sum of its proper divisors (1).

40990237 is an equidigital number, since it uses as much as digits as its factorization.

40990237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 40990237 is about 6402.3618298250. The cubic root of 40990237 is about 344.7943519916.

The spelling of 40990237 in words is "forty million, nine hundred ninety thousand, two hundred thirty-seven".