40629709 has 2 divisors, whose sum is σ = 40629710. Its totient is φ = 40629708.

The previous prime is 40629703. The next prime is 40629739. The reversal of 40629709 is 90792604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33895684 + 6734025 = 5822^2 + 2595^2 .

It is a cyclic number.

It is not a de Polignac number, because 40629709 - 2¹⁷ = 40498637 is a prime.

It is equal to p_2469592 and since 40629709 and 2469592 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40629703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20314854 + 20314855.

It is an arithmetic number, because the mean of its divisors is an integer number (20314855).

Almost surely, 2^40629709 is an apocalyptic number.

It is an amenable number.

40629709 is a deficient number, since it is larger than the sum of its proper divisors (1).

40629709 is an equidigital number, since it uses as much as digits as its factorization.

40629709 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 40629709 is about 6374.1437856390. The cubic root of 40629709 is about 343.7804987155.

The spelling of 40629709 in words is "forty million, six hundred twenty-nine thousand, seven hundred nine".