40920193 has 2 divisors, whose sum is σ = 40920194. Its totient is φ = 40920192.

The previous prime is 40920181. The next prime is 40920199. The reversal of 40920193 is 39102904.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37797904 + 3122289 = 6148^2 + 1767^2 .

It is a cyclic number.

It is not a de Polignac number, because 40920193 - 2⁵ = 40920161 is a prime.

It is not a weakly prime, because it can be changed into another prime (40920199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20460096 + 20460097.

It is an arithmetic number, because the mean of its divisors is an integer number (20460097).

Almost surely, 2^40920193 is an apocalyptic number.

It is an amenable number.

40920193 is a deficient number, since it is larger than the sum of its proper divisors (1).

40920193 is an equidigital number, since it uses as much as digits as its factorization.

40920193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 40920193 is about 6396.8893221628. The cubic root of 40920193 is about 344.5978454843.

It can be divided in two parts, 409 and 20193, that added together give a palindrome (20602).

The spelling of 40920193 in words is "forty million, nine hundred twenty thousand, one hundred ninety-three".