40355837 has 2 divisors, whose sum is σ = 40355838. Its totient is φ = 40355836.

The previous prime is 40355827. The next prime is 40355857. The reversal of 40355837 is 73855304.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40018276 + 337561 = 6326^2 + 581^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40355837 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40355797 and 40355806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40355827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20177918 + 20177919.

It is an arithmetic number, because the mean of its divisors is an integer number (20177919).

Almost surely, 2^40355837 is an apocalyptic number.

It is an amenable number.

40355837 is a deficient number, since it is larger than the sum of its proper divisors (1).

40355837 is an equidigital number, since it uses as much as digits as its factorization.

40355837 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 40355837 is about 6352.6244183015. The cubic root of 40355837 is about 343.0063181127.

The spelling of 40355837 in words is "forty million, three hundred fifty-five thousand, eight hundred thirty-seven".