9979145 has 8 divisors (see below), whose sum is σ = 13063680. Its totient is φ = 7257520.

The previous prime is 9979127. The next prime is 9979163. The reversal of 9979145 is 5419799.

It is an interprime number because it is at equal distance from previous prime (9979127) and next prime (9979163).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 9979145 - 2⁸ = 9978889 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 9979096 and 9979105.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90665 + ... + 90774.

It is an arithmetic number, because the mean of its divisors is an integer number (1632960).

Almost surely, 2^9979145 is an apocalyptic number.

It is an amenable number.

9979145 is a deficient number, since it is larger than the sum of its proper divisors (3084535).

9979145 is a wasteful number, since it uses less digits than its factorization.

9979145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181455.

The product of its digits is 102060, while the sum is 44.

The square root of 9979145 is about 3158.9784741274. The cubic root of 9979145 is about 215.2935956497.

The spelling of 9979145 in words is "nine million, nine hundred seventy-nine thousand, one hundred forty-five".