1426944781 has 2 divisors, whose sum is σ = 1426944782. Its totient is φ = 1426944780.

The previous prime is 1426944767. The next prime is 1426944877. The reversal of 1426944781 is 1874496241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 995718025 + 431226756 = 31555^2 + 20766^2 .

It is a cyclic number.

It is not a de Polignac number, because 1426944781 - 2⁷ = 1426944653 is a prime.

It is a super-2 number, since 2×1426944781² = 4072342816046275922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1426944721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713472390 + 713472391.

It is an arithmetic number, because the mean of its divisors is an integer number (713472391).

Almost surely, 2^1426944781 is an apocalyptic number.

It is an amenable number.

1426944781 is a deficient number, since it is larger than the sum of its proper divisors (1).

1426944781 is an equidigital number, since it uses as much as digits as its factorization.

1426944781 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 387072, while the sum is 46.

The square root of 1426944781 is about 37774.9226471743. The cubic root of 1426944781 is about 1125.8202494728.

The spelling of 1426944781 in words is "one billion, four hundred twenty-six million, nine hundred forty-four thousand, seven hundred eighty-one".