1278070403 has 2 divisors, whose sum is σ = 1278070404. Its totient is φ = 1278070402.

The previous prime is 1278070369. The next prime is 1278070411. The reversal of 1278070403 is 3040708721.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1278070403 - 2⁸ = 1278070147 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1278070403.

It is not a weakly prime, because it can be changed into another prime (1278070433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 639035201 + 639035202.

It is an arithmetic number, because the mean of its divisors is an integer number (639035202).

Almost surely, 2^1278070403 is an apocalyptic number.

1278070403 is a deficient number, since it is larger than the sum of its proper divisors (1).

1278070403 is an equidigital number, since it uses as much as digits as its factorization.

1278070403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 1278070403 is about 35750.1105312977. The cubic root of 1278070403 is about 1085.2211751533.

The spelling of 1278070403 in words is "one billion, two hundred seventy-eight million, seventy thousand, four hundred three".