400803019 has 2 divisors, whose sum is σ = 400803020. Its totient is φ = 400803018.

The previous prime is 400802959. The next prime is 400803077. The reversal of 400803019 is 910308004.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 400803019 - 2¹¹ = 400800971 is a prime.

It is a super-2 number, since 2×400803019² = 321286120079028722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 400802984 and 400803002.

It is not a weakly prime, because it can be changed into another prime (400803719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200401509 + 200401510.

It is an arithmetic number, because the mean of its divisors is an integer number (200401510).

Almost surely, 2^400803019 is an apocalyptic number.

400803019 is a deficient number, since it is larger than the sum of its proper divisors (1).

400803019 is an equidigital number, since it uses as much as digits as its factorization.

400803019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 400803019 is about 20020.0654094836. The cubic root of 400803019 is about 737.2990280315.

The spelling of 400803019 in words is "four hundred million, eight hundred three thousand, nineteen".