40297919 has 2 divisors, whose sum is σ = 40297920. Its totient is φ = 40297918.

The previous prime is 40297903. The next prime is 40297927. The reversal of 40297919 is 91979204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40297919 - 2⁴ = 40297903 is a prime.

It is a super-2 number, since 2×40297919² = 3247844551461122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40297949) 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, 20148959 + 20148960.

It is an arithmetic number, because the mean of its divisors is an integer number (20148960).

Almost surely, 2^40297919 is an apocalyptic number.

40297919 is a deficient number, since it is larger than the sum of its proper divisors (1).

40297919 is an equidigital number, since it uses as much as digits as its factorization.

40297919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 40297919 is about 6348.0641931222. The cubic root of 40297919 is about 342.8421473022.

The spelling of 40297919 in words is "forty million, two hundred ninety-seven thousand, nine hundred nineteen".