40229129 has 2 divisors, whose sum is σ = 40229130. Its totient is φ = 40229128.

The previous prime is 40229087. The next prime is 40229141. The reversal of 40229129 is 92192204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23541904 + 16687225 = 4852^2 + 4085^2 .

It is a cyclic number.

It is not a de Polignac number, because 40229129 - 2⁸ = 40228873 is a prime.

It is a Chen prime.

It is equal to p_2446724 and since 40229129 and 2446724 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (40229149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20114564 + 20114565.

It is an arithmetic number, because the mean of its divisors is an integer number (20114565).

Almost surely, 2^40229129 is an apocalyptic number.

It is an amenable number.

40229129 is a deficient number, since it is larger than the sum of its proper divisors (1).

40229129 is an equidigital number, since it uses as much as digits as its factorization.

40229129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 40229129 is about 6342.6436917109. The cubic root of 40229129 is about 342.6469548929.

The spelling of 40229129 in words is "forty million, two hundred twenty-nine thousand, one hundred twenty-nine".