40872037 has 2 divisors, whose sum is σ = 40872038.
Its totient is φ = 40872036.
The previous prime is 40872023. The next prime is 40872053. The reversal of 40872037 is 73027804.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 30316036 + 10556001 = 5506^2 + 3249^2
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-40872037 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (40872067) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20436018 + 20436019.
It is an arithmetic number, because the mean of its divisors is an integer number (20436019).
Almost surely, 240872037 is an apocalyptic number.
It is an amenable number.
40872037 is a deficient number, since it is larger than the sum of its proper divisors (1).
40872037 is an equidigital number, since it uses as much as digits as its factorization.
40872037 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 9408, while the sum is 31.
The square root of 40872037 is about 6393.1241971355.
The cubic root of 40872037 is about 344.4626150394.
The spelling of 40872037 in words is "forty million, eight hundred seventy-two thousand, thirty-seven".