9970065421 has 4 divisors (see below), whose sum is σ = 9970784512. Its totient is φ = 9969346332.

The previous prime is 9970065349. The next prime is 9970065431. The reversal of 9970065421 is 1245600799.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9970065421 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 (9970065431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338331 + ... + 366616.

It is an arithmetic number, because the mean of its divisors is an integer number (2492696128).

Almost surely, 2^9970065421 is an apocalyptic number.

It is an amenable number.

9970065421 is a deficient number, since it is larger than the sum of its proper divisors (719091).

9970065421 is a wasteful number, since it uses less digits than its factorization.

9970065421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719090.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 9970065421 is about 99850.2149271598. The cubic root of 9970065421 is about 2152.2828048946.

The spelling of 9970065421 in words is "nine billion, nine hundred seventy million, sixty-five thousand, four hundred twenty-one".