1427800117 has 2 divisors, whose sum is σ = 1427800118. Its totient is φ = 1427800116.

The previous prime is 1427800103. The next prime is 1427800151. The reversal of 1427800117 is 7110087241.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 994077841 + 433722276 = 31529^2 + 20826^2 .

It is a cyclic number.

It is not a de Polignac number, because 1427800117 - 2²³ = 1419411509 is a prime.

It is a super-2 number, since 2×1427800117² = 4077226348210427378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1427800817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 713900058 + 713900059.

It is an arithmetic number, because the mean of its divisors is an integer number (713900059).

Almost surely, 2^1427800117 is an apocalyptic number.

It is an amenable number.

1427800117 is a deficient number, since it is larger than the sum of its proper divisors (1).

1427800117 is an equidigital number, since it uses as much as digits as its factorization.

1427800117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 31.

The square root of 1427800117 is about 37786.2424302814. The cubic root of 1427800117 is about 1126.0451500814.

Adding to 1427800117 its reverse (7110087241), we get a palindrome (8537887358).

The spelling of 1427800117 in words is "one billion, four hundred twenty-seven million, eight hundred thousand, one hundred seventeen".