78572863 has 4 divisors (see below), whose sum is σ = 79519608. Its totient is φ = 77626120.

The previous prime is 78572831. The next prime is 78572869. The reversal of 78572863 is 36827587.

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 78572863 - 2⁵ = 78572831 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 (78572869) 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, 473248 + ... + 473413.

It is an arithmetic number, because the mean of its divisors is an integer number (19879902).

Almost surely, 2^78572863 is an apocalyptic number.

78572863 is a deficient number, since it is larger than the sum of its proper divisors (946745).

78572863 is an equidigital number, since it uses as much as digits as its factorization.

78572863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 946744.

The product of its digits is 564480, while the sum is 46.

The square root of 78572863 is about 8864.1335165937. The cubic root of 78572863 is about 428.3093212612.

The spelling of 78572863 in words is "seventy-eight million, five hundred seventy-two thousand, eight hundred sixty-three".