426877109 has 2 divisors, whose sum is σ = 426877110. Its totient is φ = 426877108.

The previous prime is 426877091. The next prime is 426877111. The reversal of 426877109 is 901778624.

Together with previous prime (426877091) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424978225 + 1898884 = 20615^2 + 1378^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426877109 is a prime.

It is a super-3 number, since 3×426877109³ (a number of 27 digits) contains 333 as substring.

It is a Sophie Germain prime.

Together with 426877111, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 426877109.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426874109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213438554 + 213438555.

It is an arithmetic number, because the mean of its divisors is an integer number (213438555).

Almost surely, 2^426877109 is an apocalyptic number.

It is an amenable number.

426877109 is a deficient number, since it is larger than the sum of its proper divisors (1).

426877109 is an equidigital number, since it uses as much as digits as its factorization.

426877109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 44.

The square root of 426877109 is about 20661.0045496341. The cubic root of 426877109 is about 752.9525738975.

The spelling of 426877109 in words is "four hundred twenty-six million, eight hundred seventy-seven thousand, one hundred nine".