78348853 has 4 divisors (see below), whose sum is σ = 85471488. Its totient is φ = 71226220.

The previous prime is 78348847. The next prime is 78348877. The reversal of 78348853 is 35884387.

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 78348853 - 2⁵ = 78348821 is a prime.

It is a super-2 number, since 2×78348853² = 12277085532831218, 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 (78348353) 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, 3561301 + ... + 3561322.

It is an arithmetic number, because the mean of its divisors is an integer number (21367872).

Almost surely, 2^78348853 is an apocalyptic number.

It is an amenable number.

78348853 is a deficient number, since it is larger than the sum of its proper divisors (7122635).

78348853 is a wasteful number, since it uses less digits than its factorization.

78348853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7122634.

The product of its digits is 645120, while the sum is 46.

The square root of 78348853 is about 8851.4887448384. The cubic root of 78348853 is about 427.9018994455.

The spelling of 78348853 in words is "seventy-eight million, three hundred forty-eight thousand, eight hundred fifty-three".