999973422 has 96 divisors (see below), whose sum is σ = 2646888192. Its totient is φ = 266326272.

The previous prime is 999973421. The next prime is 999973423. The reversal of 999973422 is 224379999.

It is an interprime number because it is at equal distance from previous prime (999973421) and next prime (999973423).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999973421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 227013 + ... + 231375.

It is an arithmetic number, because the mean of its divisors is an integer number (27571752).

Almost surely, 2^999973422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999973422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1323444096).

999973422 is an abundant number, since it is smaller than the sum of its proper divisors (1646914770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

999973422 is a wasteful number, since it uses less digits than its factorization.

999973422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502 (or 4499 counting only the distinct ones).

The product of its digits is 2204496, while the sum is 54.

The square root of 999973422 is about 31622.3563638132. The cubic root of 999973422 is about 999.9911405882.

The spelling of 999973422 in words is "nine hundred ninety-nine million, nine hundred seventy-three thousand, four hundred twenty-two".