78853381 has 4 divisors (see below), whose sum is σ = 79964064. Its totient is φ = 77742700.

The previous prime is 78853351. The next prime is 78853399. The reversal of 78853381 is 18335887.

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 78853381 - 2¹⁷ = 78722309 is a prime.

It is a super-2 number, since 2×78853381² = 12435711390262322, 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 (78853351) 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, 555235 + ... + 555376.

It is an arithmetic number, because the mean of its divisors is an integer number (19991016).

Almost surely, 2^78853381 is an apocalyptic number.

78853381 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

It is an amenable number.

78853381 is a deficient number, since it is larger than the sum of its proper divisors (1110683).

78853381 is a wasteful number, since it uses less digits than its factorization.

78853381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1110682.

The product of its digits is 161280, while the sum is 43.

The square root of 78853381 is about 8879.9426236885. The cubic root of 78853381 is about 428.8184273710.

The spelling of 78853381 in words is "seventy-eight million, eight hundred fifty-three thousand, three hundred eighty-one".