40161697 has 2 divisors, whose sum is σ = 40161698. Its totient is φ = 40161696.

The previous prime is 40161683. The next prime is 40161707. The reversal of 40161697 is 79616104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38825361 + 1336336 = 6231^2 + 1156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40161697 is a prime.

It is a super-2 number, since 2×40161697² = 3225923811839618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40161677) 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, 20080848 + 20080849.

It is an arithmetic number, because the mean of its divisors is an integer number (20080849).

Almost surely, 2^40161697 is an apocalyptic number.

It is an amenable number.

40161697 is a deficient number, since it is larger than the sum of its proper divisors (1).

40161697 is an equidigital number, since it uses as much as digits as its factorization.

40161697 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 34.

The square root of 40161697 is about 6337.3256978003. The cubic root of 40161697 is about 342.4553997370.

The spelling of 40161697 in words is "forty million, one hundred sixty-one thousand, six hundred ninety-seven".