7898999 has 4 divisors (see below), whose sum is σ = 8363664. Its totient is φ = 7434336.

The previous prime is 7898993. The next prime is 7899011. The reversal of 7898999 is 9998987.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9998987 = 1613 ⋅6199.

It is a cyclic number.

It is not a de Polignac number, because 7898999 - 2⁴ = 7898983 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 (7898993) 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, 232307 + ... + 232340.

It is an arithmetic number, because the mean of its divisors is an integer number (2090916).

Almost surely, 2^7898999 is an apocalyptic number.

7898999 is a deficient number, since it is larger than the sum of its proper divisors (464665).

7898999 is a wasteful number, since it uses less digits than its factorization.

7898999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464664.

The product of its digits is 2939328, while the sum is 59.

The square root of 7898999 is about 2810.5157889612. The cubic root of 7898999 is about 199.1547578609.

The spelling of 7898999 in words is "seven million, eight hundred ninety-eight thousand, nine hundred ninety-nine".