283091978509 has 2 divisors, whose sum is σ = 283091978510. Its totient is φ = 283091978508.

The previous prime is 283091978503. The next prime is 283091978513. The reversal of 283091978509 is 905879190382.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220286606409 + 62805372100 = 469347^2 + 250610^2 .

It is a cyclic number.

It is not a de Polignac number, because 283091978509 - 2⁹ = 283091977997 is a prime.

It is a super-2 number, since 2×283091978509² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (283091978503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 141545989254 + 141545989255.

It is an arithmetic number, because the mean of its divisors is an integer number (141545989255).

Almost surely, 2^283091978509 is an apocalyptic number.

It is an amenable number.

283091978509 is a deficient number, since it is larger than the sum of its proper divisors (1).

283091978509 is an equidigital number, since it uses as much as digits as its factorization.

283091978509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9797760, while the sum is 61.

The spelling of 283091978509 in words is "two hundred eighty-three billion, ninety-one million, nine hundred seventy-eight thousand, five hundred nine".