78487801 has 8 divisors (see below), whose sum is σ = 89841344. Its totient is φ = 67169520.

The previous prime is 78487777. The next prime is 78487813. The reversal of 78487801 is 10878487.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-78487801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78487831) 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, 3855 + ... + 13108.

It is an arithmetic number, because the mean of its divisors is an integer number (11230168).

Almost surely, 2^78487801 is an apocalyptic number.

It is an amenable number.

78487801 is a deficient number, since it is larger than the sum of its proper divisors (11353543).

78487801 is a wasteful number, since it uses less digits than its factorization.

78487801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17631.

The product of its (nonzero) digits is 100352, while the sum is 43.

The square root of 78487801 is about 8859.3341171896. The cubic root of 78487801 is about 428.1547046788.

The spelling of 78487801 in words is "seventy-eight million, four hundred eighty-seven thousand, eight hundred one".