405729941 has 2 divisors, whose sum is σ = 405729942. Its totient is φ = 405729940.

The previous prime is 405729931. The next prime is 405729943. The reversal of 405729941 is 149927504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 251349316 + 154380625 = 15854^2 + 12425^2 .

It is a cyclic number.

It is not a de Polignac number, because 405729941 - 2²² = 401535637 is a prime.

Together with 405729943, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405729943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202864970 + 202864971.

It is an arithmetic number, because the mean of its divisors is an integer number (202864971).

Almost surely, 2^405729941 is an apocalyptic number.

It is an amenable number.

405729941 is a deficient number, since it is larger than the sum of its proper divisors (1).

405729941 is an equidigital number, since it uses as much as digits as its factorization.

405729941 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 405729941 is about 20142.7391632816. The cubic root of 405729941 is about 740.3078467143.

The spelling of 405729941 in words is "four hundred five million, seven hundred twenty-nine thousand, nine hundred forty-one".