78130853 has 4 divisors (see below), whose sum is σ = 78151788. Its totient is φ = 78109920.

The previous prime is 78130847. The next prime is 78130859. The reversal of 78130853 is 35803187.

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

It is an interprime number because it is at equal distance from previous prime (78130847) and next prime (78130859).

It can be written as a sum of positive squares in 2 ways, for example, as 44930209 + 33200644 = 6703^2 + 5762^2 .

It is a cyclic number.

It is not a de Polignac number, because 78130853 - 2⁴ = 78130837 is a prime.

It is a super-2 number, since 2×78130853² = 12208860381015218, 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 (78130859) 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, 3176 + ... + 12897.

It is an arithmetic number, because the mean of its divisors is an integer number (19537947).

Almost surely, 2^78130853 is an apocalyptic number.

It is an amenable number.

78130853 is a deficient number, since it is larger than the sum of its proper divisors (20935).

78130853 is a wasteful number, since it uses less digits than its factorization.

78130853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20934.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 78130853 is about 8839.1658543100. The cubic root of 78130853 is about 427.5046621244.

The spelling of 78130853 in words is "seventy-eight million, one hundred thirty thousand, eight hundred fifty-three".