78200053 has 4 divisors (see below), whose sum is σ = 78271180. Its totient is φ = 78128928.

The previous prime is 78200047. The next prime is 78200063. The reversal of 78200053 is 35000287.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6932689 + 71267364 = 2633^2 + 8442^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78200053 is a prime.

It is a super-2 number, since 2×78200053² = 12230496578405618, 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 (78200033) 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, 33888 + ... + 36121.

It is an arithmetic number, because the mean of its divisors is an integer number (19567795).

Almost surely, 2^78200053 is an apocalyptic number.

It is an amenable number.

78200053 is a deficient number, since it is larger than the sum of its proper divisors (71127).

78200053 is a wasteful number, since it uses less digits than its factorization.

78200053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71126.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 78200053 is about 8843.0793844678. The cubic root of 78200053 is about 427.6308376017.

The spelling of 78200053 in words is "seventy-eight million, two hundred thousand, fifty-three".