9919147 has 8 divisors (see below), whose sum is σ = 11395296. Its totient is φ = 8457792.

The previous prime is 9919097. The next prime is 9919183. The reversal of 9919147 is 7419199.

It is a happy number.

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

It is not a de Polignac number, because 9919147 - 2¹⁹ = 9394859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9919447) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2218 + ... + 4975.

It is an arithmetic number, because the mean of its divisors is an integer number (1424412).

Almost surely, 2^9919147 is an apocalyptic number.

9919147 is a deficient number, since it is larger than the sum of its proper divisors (1476149).

9919147 is a wasteful number, since it uses less digits than its factorization.

9919147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7397.

The product of its digits is 20412, while the sum is 40.

The square root of 9919147 is about 3149.4677328082. The cubic root of 9919147 is about 214.8612553551.

The spelling of 9919147 in words is "nine million, nine hundred nineteen thousand, one hundred forty-seven".