9973491 has 8 divisors (see below), whose sum is σ = 14506944. Its totient is φ = 6044520.

The previous prime is 9973489. The next prime is 9973507. The reversal of 9973491 is 1943799.

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

It is not a de Polignac number, because 9973491 - 2¹ = 9973489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9973591) 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 7 ways as a sum of consecutive naturals, for example, 151081 + ... + 151146.

It is an arithmetic number, because the mean of its divisors is an integer number (1813368).

Almost surely, 2^9973491 is an apocalyptic number.

9973491 is a deficient number, since it is larger than the sum of its proper divisors (4533453).

9973491 is a wasteful number, since it uses less digits than its factorization.

9973491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 302241.

The product of its digits is 61236, while the sum is 42.

The square root of 9973491 is about 3158.0834377831. The cubic root of 9973491 is about 215.2529275044.

The spelling of 9973491 in words is "nine million, nine hundred seventy-three thousand, four hundred ninety-one".