405049919 has 2 divisors, whose sum is σ = 405049920. Its totient is φ = 405049918.

The previous prime is 405049889. The next prime is 405049949. The reversal of 405049919 is 919940504.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (405049889) and next prime (405049949).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405049919 is a prime.

It is a super-2 number, since 2×405049919² = 328130873763813122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405049949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202524959 + 202524960.

It is an arithmetic number, because the mean of its divisors is an integer number (202524960).

Almost surely, 2^405049919 is an apocalyptic number.

405049919 is a deficient number, since it is larger than the sum of its proper divisors (1).

405049919 is an equidigital number, since it uses as much as digits as its factorization.

405049919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 58320, while the sum is 41.

The square root of 405049919 is about 20125.8520068096. The cubic root of 405049919 is about 739.8940187887.

The spelling of 405049919 in words is "four hundred five million, forty-nine thousand, nine hundred nineteen".