787478871 has 4 divisors (see below), whose sum is σ = 1049971832. Its totient is φ = 524985912.

The previous prime is 787478869. The next prime is 787478897. The reversal of 787478871 is 178874787.

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

It is not a de Polignac number, because 787478871 - 2¹ = 787478869 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 (787478971) 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, 131246476 + ... + 131246481.

It is an arithmetic number, because the mean of its divisors is an integer number (262492958).

Almost surely, 2^787478871 is an apocalyptic number.

787478871 is a deficient number, since it is larger than the sum of its proper divisors (262492961).

787478871 is a wasteful number, since it uses less digits than its factorization.

787478871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 262492960.

The product of its digits is 4917248, while the sum is 57.

The square root of 787478871 is about 28062.0539340940. The cubic root of 787478871 is about 923.4491162163.

The spelling of 787478871 in words is "seven hundred eighty-seven million, four hundred seventy-eight thousand, eight hundred seventy-one".