78037823 has 4 divisors (see below), whose sum is σ = 78223608. Its totient is φ = 77852040.

The previous prime is 78037763. The next prime is 78037829. The reversal of 78037823 is 32873087.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 78037823 - 2⁶ = 78037759 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 (78037829) 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, 92261 + ... + 93102.

It is an arithmetic number, because the mean of its divisors is an integer number (19555902).

Almost surely, 2^78037823 is an apocalyptic number.

78037823 is a deficient number, since it is larger than the sum of its proper divisors (185785).

78037823 is a wasteful number, since it uses less digits than its factorization.

78037823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185784.

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 78037823 is about 8833.9019125186. The cubic root of 78037823 is about 427.3349188771.

The spelling of 78037823 in words is "seventy-eight million, thirty-seven thousand, eight hundred twenty-three".