78353493 has 8 divisors (see below), whose sum is σ = 110616768. Its totient is φ = 49162944.

The previous prime is 78353489. The next prime is 78353533. The reversal of 78353493 is 39435387.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78353493 - 2² = 78353489 is a prime.

It is a super-2 number, since 2×78353493² = 12278539730602098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78353413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 768121 + ... + 768222.

It is an arithmetic number, because the mean of its divisors is an integer number (13827096).

Almost surely, 2^78353493 is an apocalyptic number.

It is an amenable number.

78353493 is a deficient number, since it is larger than the sum of its proper divisors (32263275).

78353493 is a wasteful number, since it uses less digits than its factorization.

78353493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1536363.

The product of its digits is 272160, while the sum is 42.

The square root of 78353493 is about 8851.7508437597. The cubic root of 78353493 is about 427.9103463917.

The spelling of 78353493 in words is "seventy-eight million, three hundred fifty-three thousand, four hundred ninety-three".