9955491 has 16 divisors (see below), whose sum is σ = 16337664. Its totient is φ = 5251104.

The previous prime is 9955471. The next prime is 9955499. The reversal of 9955491 is 1945599.

It is a happy number.

It is not a de Polignac number, because 9955491 - 2⁵ = 9955459 is a prime.

It is a super-2 number, since 2×9955491² = 198223602102162, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9955499) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17961 + ... + 18506.

It is an arithmetic number, because the mean of its divisors is an integer number (1021104).

Almost surely, 2^9955491 is an apocalyptic number.

9955491 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

9955491 is a deficient number, since it is larger than the sum of its proper divisors (6382173).

9955491 is a wasteful number, since it uses less digits than its factorization.

9955491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36490.

The product of its digits is 72900, while the sum is 42.

The square root of 9955491 is about 3155.2323210819. The cubic root of 9955491 is about 215.1233544878.

The spelling of 9955491 in words is "nine million, nine hundred fifty-five thousand, four hundred ninety-one".