9978655233 has 4 divisors (see below), whose sum is σ = 13304873648. Its totient is φ = 6652436820.

The previous prime is 9978655231. The next prime is 9978655273. The reversal of 9978655233 is 3325568799.

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 not a de Polignac number, because 9978655233 - 2¹ = 9978655231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9978655231) 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, 1663109203 + ... + 1663109208.

It is an arithmetic number, because the mean of its divisors is an integer number (3326218412).

Almost surely, 2^9978655233 is an apocalyptic number.

It is an amenable number.

9978655233 is a deficient number, since it is larger than the sum of its proper divisors (3326218415).

9978655233 is a wasteful number, since it uses less digits than its factorization.

9978655233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326218414.

The product of its digits is 12247200, while the sum is 57.

The square root of 9978655233 is about 99893.2191542549. The cubic root of 9978655233 is about 2152.9007345671.

The spelling of 9978655233 in words is "nine billion, nine hundred seventy-eight million, six hundred fifty-five thousand, two hundred thirty-three".