9970409 has 2 divisors, whose sum is σ = 9970410. Its totient is φ = 9970408.

The previous prime is 9970397. The next prime is 9970423. The reversal of 9970409 is 9040799.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9954025 + 16384 = 3155^2 + 128^2 .

It is an emirp because it is prime and its reverse (9040799) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9970409 - 2²⁰ = 8921833 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (9970489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4985204 + 4985205.

It is an arithmetic number, because the mean of its divisors is an integer number (4985205).

Almost surely, 2^9970409 is an apocalyptic number.

It is an amenable number.

9970409 is a deficient number, since it is larger than the sum of its proper divisors (1).

9970409 is an equidigital number, since it uses as much as digits as its factorization.

9970409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20412, while the sum is 38.

The square root of 9970409 is about 3157.5954459050. The cubic root of 9970409 is about 215.2307527925.

The spelling of 9970409 in words is "nine million, nine hundred seventy thousand, four hundred nine".