78441523 has 16 divisors (see below), whose sum is σ = 84015360. Its totient is φ = 73076256.

The previous prime is 78441509. The next prime is 78441533. The reversal of 78441523 is 32514487.

It is a cyclic number.

It is not a de Polignac number, because 78441523 - 2²¹ = 76344371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78441533) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167736 + ... + 168202.

It is an arithmetic number, because the mean of its divisors is an integer number (5250960).

Almost surely, 2^78441523 is an apocalyptic number.

78441523 is a deficient number, since it is larger than the sum of its proper divisors (5573837).

78441523 is a wasteful number, since it uses less digits than its factorization.

78441523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 666.

The product of its digits is 26880, while the sum is 34.

The square root of 78441523 is about 8856.7219105039. The cubic root of 78441523 is about 428.0705385675.

The spelling of 78441523 in words is "seventy-eight million, four hundred forty-one thousand, five hundred twenty-three".