402808619 has 2 divisors, whose sum is σ = 402808620. Its totient is φ = 402808618.

The previous prime is 402808573. The next prime is 402808643. The reversal of 402808619 is 916808204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402808619 - 2¹⁶ = 402743083 is a prime.

It is a super-2 number, since 2×402808619² = 324509567081374322, which contains 22 as substring.

It is a Chen prime.

It is equal to p_21477926 and since 402808619 and 21477926 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 (402808019) 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, 201404309 + 201404310.

It is an arithmetic number, because the mean of its divisors is an integer number (201404310).

Almost surely, 2^402808619 is an apocalyptic number.

402808619 is a deficient number, since it is larger than the sum of its proper divisors (1).

402808619 is an equidigital number, since it uses as much as digits as its factorization.

402808619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 402808619 is about 20070.0926505086. The cubic root of 402808619 is about 738.5267859747.

The spelling of 402808619 in words is "four hundred two million, eight hundred eight thousand, six hundred nineteen".