405031019 has 2 divisors, whose sum is σ = 405031020. Its totient is φ = 405031018.

The previous prime is 405030991. The next prime is 405031031. The reversal of 405031019 is 910130504.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-405031019 is a prime.

It is a super-2 number, since 2×405031019² = 328100252704356722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 405030985 and 405031003.

It is not a weakly prime, because it can be changed into another prime (405031619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202515509 + 202515510.

It is an arithmetic number, because the mean of its divisors is an integer number (202515510).

Almost surely, 2^405031019 is an apocalyptic number.

405031019 is a deficient number, since it is larger than the sum of its proper divisors (1).

405031019 is an equidigital number, since it uses as much as digits as its factorization.

405031019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 405031019 is about 20125.3824559932. The cubic root of 405031019 is about 739.8825105657.

The spelling of 405031019 in words is "four hundred five million, thirty-one thousand, nineteen".