40006697 has 2 divisors, whose sum is σ = 40006698. Its totient is φ = 40006696.

The previous prime is 40006663. The next prime is 40006699. The reversal of 40006697 is 79660004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35271721 + 4734976 = 5939^2 + 2176^2 .

It is a cyclic number.

It is not a de Polignac number, because 40006697 - 2¹⁰ = 40005673 is a prime.

Together with 40006699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40006699) 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, 20003348 + 20003349.

It is an arithmetic number, because the mean of its divisors is an integer number (20003349).

Almost surely, 2^40006697 is an apocalyptic number.

It is an amenable number.

40006697 is a deficient number, since it is larger than the sum of its proper divisors (1).

40006697 is an equidigital number, since it uses as much as digits as its factorization.

40006697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 40006697 is about 6325.0847425153. The cubic root of 40006697 is about 342.0142744518.

The spelling of 40006697 in words is "forty million, six thousand, six hundred ninety-seven".