283120981 has 16 divisors (see below), whose sum is σ = 336063168. Its totient is φ = 235123200.

The previous prime is 283120979. The next prime is 283121011. The reversal of 283120981 is 189021382.

It is not a de Polignac number, because 283120981 - 2¹ = 283120979 is a prime.

It is a super-2 number, since 2×283120981² = 160314979764804722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (283120921) 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 15 ways as a sum of consecutive naturals, for example, 3666 + ... + 24076.

It is an arithmetic number, because the mean of its divisors is an integer number (21003948).

Almost surely, 2^283120981 is an apocalyptic number.

It is an amenable number.

283120981 is a deficient number, since it is larger than the sum of its proper divisors (52942187).

283120981 is a wasteful number, since it uses less digits than its factorization.

283120981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20532.

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 283120981 is about 16826.1992440361. The cubic root of 283120981 is about 656.6349854018.

The spelling of 283120981 in words is "two hundred eighty-three million, one hundred twenty thousand, nine hundred eighty-one".