1078128631 has 2 divisors, whose sum is σ = 1078128632. Its totient is φ = 1078128630.

The previous prime is 1078128589. The next prime is 1078128697. The reversal of 1078128631 is 1368218701.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1078128631 - 2⁷ = 1078128503 is a prime.

It is a super-2 number, since 2×1078128631² = 2324722689963868322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1078128431) 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, 539064315 + 539064316.

It is an arithmetic number, because the mean of its divisors is an integer number (539064316).

Almost surely, 2^1078128631 is an apocalyptic number.

1078128631 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078128631 is an equidigital number, since it uses as much as digits as its factorization.

1078128631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1078128631 is about 32834.8691332857. The cubic root of 1078128631 is about 1025.3926335575.

The spelling of 1078128631 in words is "one billion, seventy-eight million, one hundred twenty-eight thousand, six hundred thirty-one".