40099229 has 2 divisors, whose sum is σ = 40099230. Its totient is φ = 40099228.

The previous prime is 40099219. The next prime is 40099237. The reversal of 40099229 is 92299004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28334329 + 11764900 = 5323^2 + 3430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40099229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40099219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20049614 + 20049615.

It is an arithmetic number, because the mean of its divisors is an integer number (20049615).

Almost surely, 2^40099229 is an apocalyptic number.

It is an amenable number.

40099229 is a deficient number, since it is larger than the sum of its proper divisors (1).

40099229 is an equidigital number, since it uses as much as digits as its factorization.

40099229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 40099229 is about 6332.3952024491. The cubic root of 40099229 is about 342.2777544805.

The spelling of 40099229 in words is "forty million, ninety-nine thousand, two hundred twenty-nine".