96640421 has 4 divisors (see below), whose sum is σ = 97636812. Its totient is φ = 95644032.

The previous prime is 96640399. The next prime is 96640429. The reversal of 96640421 is 12404669.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79459396 + 17181025 = 8914^2 + 4145^2 .

It is a cyclic number.

It is not a de Polignac number, because 96640421 - 2¹⁴ = 96624037 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 (96640429) 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, 498050 + ... + 498243.

It is an arithmetic number, because the mean of its divisors is an integer number (24409203).

Almost surely, 2^96640421 is an apocalyptic number.

It is an amenable number.

96640421 is a deficient number, since it is larger than the sum of its proper divisors (996391).

96640421 is an equidigital number, since it uses as much as digits as its factorization.

96640421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996390.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 96640421 is about 9830.5859947411. The cubic root of 96640421 is about 458.9016343467.

The spelling of 96640421 in words is "ninety-six million, six hundred forty thousand, four hundred twenty-one".