1078723193 has 2 divisors, whose sum is σ = 1078723194. Its totient is φ = 1078723192.

The previous prime is 1078723189. The next prime is 1078723211. The reversal of 1078723193 is 3913278701.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 968641129 + 110082064 = 31123^2 + 10492^2 .

It is an emirp because it is prime and its reverse (3913278701) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1078723193 - 2² = 1078723189 is a prime.

It is a super-2 number, since 2×1078723193² = 2327287454232230498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1078723193.

It is not a weakly prime, because it can be changed into another prime (1078723103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539361596 + 539361597.

It is an arithmetic number, because the mean of its divisors is an integer number (539361597).

Almost surely, 2^1078723193 is an apocalyptic number.

It is an amenable number.

1078723193 is a deficient number, since it is larger than the sum of its proper divisors (1).

1078723193 is an equidigital number, since it uses as much as digits as its factorization.

1078723193 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 1078723193 is about 32843.9217055455. The cubic root of 1078723193 is about 1025.5810920404.

The spelling of 1078723193 in words is "one billion, seventy-eight million, seven hundred twenty-three thousand, one hundred ninety-three".