283207981 has 8 divisors (see below), whose sum is σ = 342705600. Its totient is φ = 228470208.

The previous prime is 283207979. The next prime is 283208021. The reversal of 283207981 is 189702382.

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

It is not a de Polignac number, because 283207981 - 2¹ = 283207979 is a prime.

It is a super-2 number, since 2×283207981² = 160413521004192722, 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 (283207181) 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 7 ways as a sum of consecutive naturals, for example, 1189831 + ... + 1190068.

It is an arithmetic number, because the mean of its divisors is an integer number (42838200).

Almost surely, 2^283207981 is an apocalyptic number.

It is an amenable number.

283207981 is a deficient number, since it is larger than the sum of its proper divisors (59497619).

283207981 is a wasteful number, since it uses less digits than its factorization.

283207981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2379923.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 283207981 is about 16828.7842995268. The cubic root of 283207981 is about 656.7022374449.

The spelling of 283207981 in words is "two hundred eighty-three million, two hundred seven thousand, nine hundred eighty-one".