78237823 has 8 divisors (see below), whose sum is σ = 79898688. Its totient is φ = 76593024.

The previous prime is 78237821. The next prime is 78237827. The reversal of 78237823 is 32873287.

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 78237823 - 2¹ = 78237821 is a prime.

It is a super-2 number, since 2×78237823² = 12242313895558658, 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 (78237821) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6090 + ... + 13912.

It is an arithmetic number, because the mean of its divisors is an integer number (9987336).

Almost surely, 2^78237823 is an apocalyptic number.

78237823 is a gapful number since it is divisible by the number (73) formed by its first and last digit.

78237823 is a deficient number, since it is larger than the sum of its proper divisors (1660865).

78237823 is a wasteful number, since it uses less digits than its factorization.

78237823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8033.

The product of its digits is 112896, while the sum is 40.

The square root of 78237823 is about 8845.2146949636. The cubic root of 78237823 is about 427.6996739449.

The spelling of 78237823 in words is "seventy-eight million, two hundred thirty-seven thousand, eight hundred twenty-three".