40812137 has 2 divisors, whose sum is σ = 40812138. Its totient is φ = 40812136.

The previous prime is 40812131. The next prime is 40812139. The reversal of 40812137 is 73121804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37503376 + 3308761 = 6124^2 + 1819^2 .

It is a cyclic number.

It is not a de Polignac number, because 40812137 - 2²⁴ = 24034921 is a prime.

Together with 40812139, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40812131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20406068 + 20406069.

It is an arithmetic number, because the mean of its divisors is an integer number (20406069).

Almost surely, 2^40812137 is an apocalyptic number.

It is an amenable number.

40812137 is a deficient number, since it is larger than the sum of its proper divisors (1).

40812137 is an equidigital number, since it uses as much as digits as its factorization.

40812137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 40812137 is about 6388.4377589517. The cubic root of 40812137 is about 344.2942570773.

The spelling of 40812137 in words is "forty million, eight hundred twelve thousand, one hundred thirty-seven".