1072778423 has 2 divisors, whose sum is σ = 1072778424. Its totient is φ = 1072778422.

The previous prime is 1072778419. The next prime is 1072778461. The reversal of 1072778423 is 3248772701.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1072778423 - 2² = 1072778419 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1072778923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536389211 + 536389212.

It is an arithmetic number, because the mean of its divisors is an integer number (536389212).

Almost surely, 2^1072778423 is an apocalyptic number.

1072778423 is a deficient number, since it is larger than the sum of its proper divisors (1).

1072778423 is an equidigital number, since it uses as much as digits as its factorization.

1072778423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 1072778423 is about 32753.2963684573. The cubic root of 1072778423 is about 1023.6936514293.

The spelling of 1072778423 in words is "one billion, seventy-two million, seven hundred seventy-eight thousand, four hundred twenty-three".