78235023 has 4 divisors (see below), whose sum is σ = 104313368. Its totient is φ = 52156680.

The previous prime is 78235021. The next prime is 78235033. The reversal of 78235023 is 32053287.

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

It is not a de Polignac number, because 78235023 - 2¹ = 78235021 is a prime.

It is a super-2 number, since 2×78235023² = 12241437647621058, 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 (78235021) 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, 13039168 + ... + 13039173.

It is an arithmetic number, because the mean of its divisors is an integer number (26078342).

Almost surely, 2^78235023 is an apocalyptic number.

78235023 is a deficient number, since it is larger than the sum of its proper divisors (26078345).

78235023 is a wasteful number, since it uses less digits than its factorization.

78235023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26078344.

The product of its (nonzero) digits is 10080, while the sum is 30.

The square root of 78235023 is about 8845.0564158743. The cubic root of 78235023 is about 427.6945716669.

The spelling of 78235023 in words is "seventy-eight million, two hundred thirty-five thousand, twenty-three".