983978121 has 16 divisors (see below), whose sum is σ = 1501968384. Its totient is φ = 561308304.

The previous prime is 983978117. The next prime is 983978131. The reversal of 983978121 is 121879389.

It is not a de Polignac number, because 983978121 - 2² = 983978117 is a prime.

It is not an unprimeable number, because it can be changed into a prime (983978131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27585 + ... + 52238.

It is an arithmetic number, because the mean of its divisors is an integer number (93873024).

Almost surely, 2^983978121 is an apocalyptic number.

It is an amenable number.

983978121 is a deficient number, since it is larger than the sum of its proper divisors (517990263).

983978121 is a wasteful number, since it uses less digits than its factorization.

983978121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80420.

The product of its digits is 217728, while the sum is 48.

The square root of 983978121 is about 31368.4255422551. The cubic root of 983978121 is about 994.6305947549.

The spelling of 983978121 in words is "nine hundred eighty-three million, nine hundred seventy-eight thousand, one hundred twenty-one".