78126623 has 8 divisors (see below), whose sum is σ = 79505328. Its totient is φ = 76754304.

The previous prime is 78126619. The next prime is 78126637. The reversal of 78126623 is 32662187.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 78126623 - 2² = 78126619 is a prime.

It is a super-2 number, since 2×78126623² = 12207538442768258, 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 (78123623) 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, 27665 + ... + 30357.

It is an arithmetic number, because the mean of its divisors is an integer number (9938166).

Almost surely, 2^78126623 is an apocalyptic number.

78126623 is a deficient number, since it is larger than the sum of its proper divisors (1378705).

78126623 is a wasteful number, since it uses less digits than its factorization.

78126623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3193.

The product of its digits is 24192, while the sum is 35.

The square root of 78126623 is about 8838.9265750995. The cubic root of 78126623 is about 427.4969469590.

The spelling of 78126623 in words is "seventy-eight million, one hundred twenty-six thousand, six hundred twenty-three".