9978141 has 4 divisors (see below), whose sum is σ = 13304192. Its totient is φ = 6652092.

The previous prime is 9978131. The next prime is 9978169. The reversal of 9978141 is 1418799.

It is a happy number.

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.

It is not a de Polignac number, because 9978141 - 2²¹ = 7880989 is a prime.

It is a Duffinian number.

9978141 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 9978141.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9978131) 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, 1663021 + ... + 1663026.

It is an arithmetic number, because the mean of its divisors is an integer number (3326048).

Almost surely, 2^9978141 is an apocalyptic number.

It is an amenable number.

9978141 is a deficient number, since it is larger than the sum of its proper divisors (3326051).

9978141 is a wasteful number, since it uses less digits than its factorization.

9978141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326050.

The product of its digits is 18144, while the sum is 39.

The square root of 9978141 is about 3158.8195579995. The cubic root of 9978141 is about 215.2863751908.

The spelling of 9978141 in words is "nine million, nine hundred seventy-eight thousand, one hundred forty-one".