996420437 has 4 divisors (see below), whose sum is σ = 997386060. Its totient is φ = 995454816.

The previous prime is 996420433. The next prime is 996420457. The reversal of 996420437 is 734024699.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 734024699 = 17093 ⋅42943.

It can be written as a sum of positive squares in 2 ways, for example, as 727165156 + 269255281 = 26966^2 + 16409^2 .

It is a cyclic number.

It is not a de Polignac number, because 996420437 - 2² = 996420433 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 (996420431) 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, 481262 + ... + 483327.

It is an arithmetic number, because the mean of its divisors is an integer number (249346515).

Almost surely, 2^996420437 is an apocalyptic number.

It is an amenable number.

996420437 is a deficient number, since it is larger than the sum of its proper divisors (965623).

996420437 is a wasteful number, since it uses less digits than its factorization.

996420437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965622.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 996420437 is about 31566.1280013878. The cubic root of 996420437 is about 998.8053857985.

The spelling of 996420437 in words is "nine hundred ninety-six million, four hundred twenty thousand, four hundred thirty-seven".