40090229 has 2 divisors, whose sum is σ = 40090230. Its totient is φ = 40090228.

The previous prime is 40090181. The next prime is 40090231. The reversal of 40090229 is 92209004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29702500 + 10387729 = 5450^2 + 3223^2 .

It is a cyclic number.

It is not a de Polignac number, because 40090229 - 2¹⁶ = 40024693 is a prime.

It is a super-2 number, since 2×40090229² = 3214452922544882, which contains 22 as substring.

Together with 40090231, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 40090198 and 40090207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40090249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20045114 + 20045115.

It is an arithmetic number, because the mean of its divisors is an integer number (20045115).

Almost surely, 2^40090229 is an apocalyptic number.

It is an amenable number.

40090229 is a deficient number, since it is larger than the sum of its proper divisors (1).

40090229 is an equidigital number, since it uses as much as digits as its factorization.

40090229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 40090229 is about 6331.6845309917. The cubic root of 40090229 is about 342.2521452576.

The spelling of 40090229 in words is "forty million, ninety thousand, two hundred twenty-nine".