40442737 has 2 divisors, whose sum is σ = 40442738. Its totient is φ = 40442736.

The previous prime is 40442669. The next prime is 40442761. The reversal of 40442737 is 73724404.

40442737 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37650496 + 2792241 = 6136^2 + 1671^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40442737 is a prime.

It is a super-2 number, since 2×40442737² = 3271229952102338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 40442699 and 40442708.

It is not a weakly prime, because it can be changed into another prime (40442767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20221368 + 20221369.

It is an arithmetic number, because the mean of its divisors is an integer number (20221369).

Almost surely, 2^40442737 is an apocalyptic number.

It is an amenable number.

40442737 is a deficient number, since it is larger than the sum of its proper divisors (1).

40442737 is an equidigital number, since it uses as much as digits as its factorization.

40442737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18816, while the sum is 31.

The square root of 40442737 is about 6359.4604330871. The cubic root of 40442737 is about 343.2523451374.

The spelling of 40442737 in words is "forty million, four hundred forty-two thousand, seven hundred thirty-seven".