9970657 has 4 divisors (see below), whose sum is σ = 9986580. Its totient is φ = 9954736.

The previous prime is 9970621. The next prime is 9970679. The reversal of 9970657 is 7560799.

9970657 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3370896 + 6599761 = 1836^2 + 2569^2 .

It is a cyclic number.

It is not a de Polignac number, because 9970657 - 2⁷ = 9970529 is a prime.

It is a Duffinian number.

9970657 is a lucky number.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (9970607) 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, 6982 + ... + 8287.

It is an arithmetic number, because the mean of its divisors is an integer number (2496645).

Almost surely, 2^9970657 is an apocalyptic number.

It is an amenable number.

9970657 is a deficient number, since it is larger than the sum of its proper divisors (15923).

9970657 is a wasteful number, since it uses less digits than its factorization.

9970657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15922.

The product of its (nonzero) digits is 119070, while the sum is 43.

The square root of 9970657 is about 3157.6347160493. The cubic root of 9970657 is about 215.2325372991.

It can be divided in two parts, 99 and 70657, that added together give a square (70756 = 266²).

The spelling of 9970657 in words is "nine million, nine hundred seventy thousand, six hundred fifty-seven".