40538737 has 2 divisors, whose sum is σ = 40538738. Its totient is φ = 40538736.

The previous prime is 40538683. The next prime is 40538747. The reversal of 40538737 is 73783504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39955041 + 583696 = 6321^2 + 764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40538737 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40538696 and 40538705.

It is not a weakly prime, because it can be changed into another prime (40538747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20269368 + 20269369.

It is an arithmetic number, because the mean of its divisors is an integer number (20269369).

Almost surely, 2^40538737 is an apocalyptic number.

It is an amenable number.

40538737 is a deficient number, since it is larger than the sum of its proper divisors (1).

40538737 is an equidigital number, since it uses as much as digits as its factorization.

40538737 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 37.

The square root of 40538737 is about 6367.0037694350. The cubic root of 40538737 is about 343.5237262613.

The spelling of 40538737 in words is "forty million, five hundred thirty-eight thousand, seven hundred thirty-seven".