78861023 has 8 divisors (see below), whose sum is σ = 81782688. Its totient is φ = 75981024.

The previous prime is 78861007. The next prime is 78861053. The reversal of 78861023 is 32016887.

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 78861023 - 2⁴ = 78861007 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 (78861053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6536 + ... + 14157.

It is an arithmetic number, because the mean of its divisors is an integer number (10222836).

Almost surely, 2^78861023 is an apocalyptic number.

78861023 is a deficient number, since it is larger than the sum of its proper divisors (2921665).

78861023 is a wasteful number, since it uses less digits than its factorization.

78861023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20833.

The product of its (nonzero) digits is 16128, while the sum is 35.

The square root of 78861023 is about 8880.3729088367. The cubic root of 78861023 is about 428.8322797661.

The spelling of 78861023 in words is "seventy-eight million, eight hundred sixty-one thousand, twenty-three".