40493197 has 2 divisors, whose sum is σ = 40493198. Its totient is φ = 40493196.

The previous prime is 40493191. The next prime is 40493209. The reversal of 40493197 is 79139404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34975396 + 5517801 = 5914^2 + 2349^2 .

It is a cyclic number.

It is not a de Polignac number, because 40493197 - 2⁷ = 40493069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40493191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20246598 + 20246599.

It is an arithmetic number, because the mean of its divisors is an integer number (20246599).

Almost surely, 2^40493197 is an apocalyptic number.

It is an amenable number.

40493197 is a deficient number, since it is larger than the sum of its proper divisors (1).

40493197 is an equidigital number, since it uses as much as digits as its factorization.

40493197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 40493197 is about 6363.4265140724. The cubic root of 40493197 is about 343.3950433164.

The spelling of 40493197 in words is "forty million, four hundred ninety-three thousand, one hundred ninety-seven".