1019878231 has 2 divisors, whose sum is σ = 1019878232. Its totient is φ = 1019878230.

The previous prime is 1019878201. The next prime is 1019878271. The reversal of 1019878231 is 1328789101.

It is an a-pointer prime, because the next prime (1019878271) can be obtained adding 1019878231 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1019878231 is a prime.

It is a super-4 number, since 4×1019878231⁴ (a number of 37 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1019878201) 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, 509939115 + 509939116.

It is an arithmetic number, because the mean of its divisors is an integer number (509939116).

Almost surely, 2^1019878231 is an apocalyptic number.

1019878231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1019878231 is an equidigital number, since it uses as much as digits as its factorization.

1019878231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 1019878231 is about 31935.5324208005. The cubic root of 1019878231 is about 1006.5826506324.

The spelling of 1019878231 in words is "one billion, nineteen million, eight hundred seventy-eight thousand, two hundred thirty-one".