40696921 has 2 divisors, whose sum is σ = 40696922. Its totient is φ = 40696920.

The previous prime is 40696907. The next prime is 40696927. The reversal of 40696921 is 12969604.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27154521 + 13542400 = 5211^2 + 3680^2 .

It is a cyclic number.

It is not a de Polignac number, because 40696921 - 2¹⁷ = 40565849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (40696927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20348460 + 20348461.

It is an arithmetic number, because the mean of its divisors is an integer number (20348461).

Almost surely, 2^40696921 is an apocalyptic number.

It is an amenable number.

40696921 is a deficient number, since it is larger than the sum of its proper divisors (1).

40696921 is an equidigital number, since it uses as much as digits as its factorization.

40696921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 40696921 is about 6379.4138445472. The cubic root of 40696921 is about 343.9699614342.

The spelling of 40696921 in words is "forty million, six hundred ninety-six thousand, nine hundred twenty-one".