1078437091 has 2 divisors, whose sum is σ = 1078437092. Its totient is φ = 1078437090.

The previous prime is 1078437079. The next prime is 1078437127. The reversal of 1078437091 is 1907348701.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1078437091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1078437001) 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 as a sum of consecutive naturals, namely, 539218545 + 539218546.

It is an arithmetic number, because the mean of its divisors is an integer number (539218546).

Almost surely, 2^1078437091 is an apocalyptic number.

1078437091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078437091 is an equidigital number, since it uses as much as digits as its factorization.

1078437091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 1078437091 is about 32839.5659380571. The cubic root of 1078437091 is about 1025.4904148559.

The spelling of 1078437091 in words is "one billion, seventy-eight million, four hundred thirty-seven thousand, ninety-one".