7898487 has 4 divisors (see below), whose sum is σ = 10531320. Its totient is φ = 5265656.

The previous prime is 7898479. The next prime is 7898519. The reversal of 7898487 is 7848987.

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 7898487 - 2³ = 7898479 is a prime.

7898487 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7898417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316412 + ... + 1316417.

It is an arithmetic number, because the mean of its divisors is an integer number (2632830).

Almost surely, 2^7898487 is an apocalyptic number.

7898487 is a deficient number, since it is larger than the sum of its proper divisors (2632833).

7898487 is a wasteful number, since it uses less digits than its factorization.

7898487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632832.

The product of its digits is 903168, while the sum is 51.

The square root of 7898487 is about 2810.4247010016. The cubic root of 7898487 is about 199.1504548077.

It can be divided in two parts, 7898 and 487, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 7898487 in words is "seven million, eight hundred ninety-eight thousand, four hundred eighty-seven".