53820919 has 4 divisors (see below), whose sum is σ = 53933760. Its totient is φ = 53708080.

The previous prime is 53820859. The next prime is 53820937. The reversal of 53820919 is 91902835.

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 53820919 - 2¹³ = 53812727 is a prime.

It is a super-2 number, since 2×53820919² = 5793382644009122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53820959) 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, 55702 + ... + 56659.

It is an arithmetic number, because the mean of its divisors is an integer number (13483440).

Almost surely, 2^53820919 is an apocalyptic number.

53820919 is a deficient number, since it is larger than the sum of its proper divisors (112841).

53820919 is a wasteful number, since it uses less digits than its factorization.

53820919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112840.

The product of its (nonzero) digits is 19440, while the sum is 37.

The square root of 53820919 is about 7336.2741906229. The cubic root of 53820919 is about 377.5580227466.

The spelling of 53820919 in words is "fifty-three million, eight hundred twenty thousand, nine hundred nineteen".