9970791 has 4 divisors (see below), whose sum is σ = 13294392. Its totient is φ = 6647192.

The previous prime is 9970787. The next prime is 9970811. The reversal of 9970791 is 1970799.

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

It is a cyclic number.

It is not a de Polignac number, because 9970791 - 2² = 9970787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9970291) 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, 1661796 + ... + 1661801.

It is an arithmetic number, because the mean of its divisors is an integer number (3323598).

Almost surely, 2^9970791 is an apocalyptic number.

9970791 is a deficient number, since it is larger than the sum of its proper divisors (3323601).

9970791 is a wasteful number, since it uses less digits than its factorization.

9970791 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3323600.

The product of its (nonzero) digits is 35721, while the sum is 42.

The square root of 9970791 is about 3157.6559343918. The cubic root of 9970791 is about 215.2335014961.

The spelling of 9970791 in words is "nine million, nine hundred seventy thousand, seven hundred ninety-one".