40084739 has 2 divisors, whose sum is σ = 40084740. Its totient is φ = 40084738.

The previous prime is 40084721. The next prime is 40084741. The reversal of 40084739 is 93748004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40084739 - 2¹² = 40080643 is a prime.

It is a super-4 number, since 4×40084739⁴ (a number of 32 digits) contains 4444 as substring.

Together with 40084741, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_2438459 and since 40084739 and 2438459 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 40084699 and 40084708.

It is not a weakly prime, because it can be changed into another prime (40084789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20042369 + 20042370.

It is an arithmetic number, because the mean of its divisors is an integer number (20042370).

Almost surely, 2^40084739 is an apocalyptic number.

40084739 is a deficient number, since it is larger than the sum of its proper divisors (1).

40084739 is an equidigital number, since it uses as much as digits as its factorization.

40084739 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 40084739 is about 6331.2509822309. The cubic root of 40084739 is about 342.2365217495.

The spelling of 40084739 in words is "forty million, eighty-four thousand, seven hundred thirty-nine".