9978427154 has 8 divisors (see below), whose sum is σ = 14975569980. Its totient is φ = 4986570496.

The previous prime is 9978427141. The next prime is 9978427169. The reversal of 9978427154 is 4517248799.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9913189225 + 65237929 = 99565^2 + 8077^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 9978427154.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1316819 + ... + 1324374.

Almost surely, 2^9978427154 is an apocalyptic number.

9978427154 is a deficient number, since it is larger than the sum of its proper divisors (4997142826).

9978427154 is a wasteful number, since it uses less digits than its factorization.

9978427154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2643084.

The product of its digits is 5080320, while the sum is 56.

The square root of 9978427154 is about 99892.0775337063. The cubic root of 9978427154 is about 2152.8843317160.

The spelling of 9978427154 in words is "nine billion, nine hundred seventy-eight million, four hundred twenty-seven thousand, one hundred fifty-four".