9978357 has 4 divisors (see below), whose sum is σ = 13304480. Its totient is φ = 6652236.

The previous prime is 9978347. The next prime is 9978359. The reversal of 9978357 is 7538799.

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 not a de Polignac number, because 9978357 - 2⁴ = 9978341 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 (9978359) 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, 1663057 + ... + 1663062.

It is an arithmetic number, because the mean of its divisors is an integer number (3326120).

Almost surely, 2^9978357 is an apocalyptic number.

It is an amenable number.

9978357 is a deficient number, since it is larger than the sum of its proper divisors (3326123).

9978357 is a wasteful number, since it uses less digits than its factorization.

9978357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3326122.

The product of its digits is 476280, while the sum is 48.

The square root of 9978357 is about 3158.8537478016. The cubic root of 9978357 is about 215.2879286372.

The spelling of 9978357 in words is "nine million, nine hundred seventy-eight thousand, three hundred fifty-seven".