40697959 has 2 divisors, whose sum is σ = 40697960. Its totient is φ = 40697958.

The previous prime is 40697939. The next prime is 40698001. The reversal of 40697959 is 95979604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40697959 - 2⁵ = 40697927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40697939) 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, 20348979 + 20348980.

It is an arithmetic number, because the mean of its divisors is an integer number (20348980).

Almost surely, 2^40697959 is an apocalyptic number.

40697959 is a deficient number, since it is larger than the sum of its proper divisors (1).

40697959 is an equidigital number, since it uses as much as digits as its factorization.

40697959 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 49.

The square root of 40697959 is about 6379.4951994652. The cubic root of 40697959 is about 343.9728857978.

The spelling of 40697959 in words is "forty million, six hundred ninety-seven thousand, nine hundred fifty-nine".