996473921 has 4 divisors (see below), whose sum is σ = 1055090052. Its totient is φ = 937857792.

The previous prime is 996473911. The next prime is 996473923. The reversal of 996473921 is 129374699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 129374699 = 6781 ⋅19079.

It can be written as a sum of positive squares in 2 ways, for example, as 874680625 + 121793296 = 29575^2 + 11036^2 .

It is a cyclic number.

It is not a de Polignac number, because 996473921 - 2¹⁴ = 996457537 is a prime.

It is a super-2 number, since 2×996473921² = 1985920550466228482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 996473921.

It is not an unprimeable number, because it can be changed into a prime (996473923) 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, 29308040 + ... + 29308073.

It is an arithmetic number, because the mean of its divisors is an integer number (263772513).

Almost surely, 2^996473921 is an apocalyptic number.

It is an amenable number.

996473921 is a deficient number, since it is larger than the sum of its proper divisors (58616131).

996473921 is a wasteful number, since it uses less digits than its factorization.

996473921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58616130.

The product of its digits is 734832, while the sum is 50.

The square root of 996473921 is about 31566.9751639273. The cubic root of 996473921 is about 998.8232561504.

The spelling of 996473921 in words is "nine hundred ninety-six million, four hundred seventy-three thousand, nine hundred twenty-one".