9920149 has 4 divisors (see below), whose sum is σ = 10131264. Its totient is φ = 9709036.

The previous prime is 9920137. The next prime is 9920159. The reversal of 9920149 is 9410299.

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 a cyclic number.

It is not a de Polignac number, because 9920149 - 2⁷ = 9920021 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 (9920159) 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, 105487 + ... + 105580.

It is an arithmetic number, because the mean of its divisors is an integer number (2532816).

Almost surely, 2^9920149 is an apocalyptic number.

It is an amenable number.

9920149 is a deficient number, since it is larger than the sum of its proper divisors (211115).

9920149 is a wasteful number, since it uses less digits than its factorization.

9920149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211114.

The product of its (nonzero) digits is 5832, while the sum is 34.

The square root of 9920149 is about 3149.6268032896. The cubic root of 9920149 is about 214.8684899735.

The spelling of 9920149 in words is "nine million, nine hundred twenty thousand, one hundred forty-nine".