7898161 has 4 divisors (see below), whose sum is σ = 8016112. Its totient is φ = 7780212.

The previous prime is 7898159. The next prime is 7898171. The reversal of 7898161 is 1618987.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1618987 = 433 ⋅3739.

It is a cyclic number.

It is not a de Polignac number, because 7898161 - 2¹ = 7898159 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7898141) 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, 58875 + ... + 59008.

It is an arithmetic number, because the mean of its divisors is an integer number (2004028).

Almost surely, 2^7898161 is an apocalyptic number.

It is an amenable number.

7898161 is a deficient number, since it is larger than the sum of its proper divisors (117951).

7898161 is a wasteful number, since it uses less digits than its factorization.

7898161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117950.

The product of its digits is 24192, while the sum is 40.

The square root of 7898161 is about 2810.3667020515. The cubic root of 7898161 is about 199.1477148761.

The spelling of 7898161 in words is "seven million, eight hundred ninety-eight thousand, one hundred sixty-one".