78888533 has 4 divisors (see below), whose sum is σ = 78963948. Its totient is φ = 78813120.

The previous prime is 78888527. The next prime is 78888559. The reversal of 78888533 is 33588887.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33588887 = 331 ⋅101477.

It can be written as a sum of positive squares in 2 ways, for example, as 55249489 + 23639044 = 7433^2 + 4862^2 .

It is a cyclic number.

It is not a de Polignac number, because 78888533 - 2²⁴ = 62111317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78888233) 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, 36116 + ... + 38237.

It is an arithmetic number, because the mean of its divisors is an integer number (19740987).

Almost surely, 2^78888533 is an apocalyptic number.

It is an amenable number.

78888533 is a deficient number, since it is larger than the sum of its proper divisors (75415).

78888533 is a wasteful number, since it uses less digits than its factorization.

78888533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75414.

The product of its digits is 1290240, while the sum is 50.

The square root of 78888533 is about 8881.9216952189. The cubic root of 78888533 is about 428.8821388053.

The spelling of 78888533 in words is "seventy-eight million, eight hundred eighty-eight thousand, five hundred thirty-three".