53819709 has 4 divisors (see below), whose sum is σ = 71759616. Its totient is φ = 35879804.

The previous prime is 53819707. The next prime is 53819729. The reversal of 53819709 is 90791835.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 53819709 - 2¹ = 53819707 is a prime.

It is a super-2 number, since 2×53819709² = 5793122153689362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53819707) 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, 8969949 + ... + 8969954.

It is an arithmetic number, because the mean of its divisors is an integer number (17939904).

Almost surely, 2^53819709 is an apocalyptic number.

It is an amenable number.

53819709 is a deficient number, since it is larger than the sum of its proper divisors (17939907).

53819709 is a wasteful number, since it uses less digits than its factorization.

53819709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17939906.

The product of its (nonzero) digits is 68040, while the sum is 42.

The square root of 53819709 is about 7336.1917232308. The cubic root of 53819709 is about 377.5551933100. Note that the first 3 decimals are identical.

The spelling of 53819709 in words is "fifty-three million, eight hundred nineteen thousand, seven hundred nine".