402053819 has 4 divisors (see below), whose sum is σ = 402108600. Its totient is φ = 401999040.

The previous prime is 402053809. The next prime is 402053833. The reversal of 402053819 is 918350204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 402053819 - 2¹⁶ = 401988283 is a prime.

It is a super-2 number, since 2×402053819² = 323294546744969522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402053809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14294 + ... + 31755.

It is an arithmetic number, because the mean of its divisors is an integer number (100527150).

Almost surely, 2^402053819 is an apocalyptic number.

402053819 is a deficient number, since it is larger than the sum of its proper divisors (54781).

402053819 is an equidigital number, since it uses as much as digits as its factorization.

402053819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54780.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 402053819 is about 20051.2797347202. The cubic root of 402053819 is about 738.0652031951.

The spelling of 402053819 in words is "four hundred two million, fifty-three thousand, eight hundred nineteen".