79478787 has 8 divisors (see below), whose sum is σ = 108556560. Its totient is φ = 51693440.

The previous prime is 79478783. The next prime is 79478797. The reversal of 79478787 is 78787497.

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 79478787 - 2² = 79478783 is a prime.

It is not an unprimeable number, because it can be changed into a prime (79478783) 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, 322962 + ... + 323207.

It is an arithmetic number, because the mean of its divisors is an integer number (13569570).

Almost surely, 2^79478787 is an apocalyptic number.

79478787 is a deficient number, since it is larger than the sum of its proper divisors (29077773).

79478787 is a wasteful number, since it uses less digits than its factorization.

79478787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646213.

The product of its digits is 5531904, while the sum is 57.

The square root of 79478787 is about 8915.0876047294. The cubic root of 79478787 is about 429.9491322557.

The spelling of 79478787 in words is "seventy-nine million, four hundred seventy-eight thousand, seven hundred eighty-seven".