1351801817 has 2 divisors, whose sum is σ = 1351801818. Its totient is φ = 1351801816.

The previous prime is 1351801813. The next prime is 1351801819. The reversal of 1351801817 is 7181081531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1347183616 + 4618201 = 36704^2 + 2149^2 .

It is a cyclic number.

It is not a de Polignac number, because 1351801817 - 2² = 1351801813 is a prime.

Together with 1351801819, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1351801813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 675900908 + 675900909.

It is an arithmetic number, because the mean of its divisors is an integer number (675900909).

Almost surely, 2^1351801817 is an apocalyptic number.

It is an amenable number.

1351801817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1351801817 is an equidigital number, since it uses as much as digits as its factorization.

1351801817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6720, while the sum is 35.

The square root of 1351801817 is about 36766.8575894106. The cubic root of 1351801817 is about 1105.7009310434.

The spelling of 1351801817 in words is "one billion, three hundred fifty-one million, eight hundred one thousand, eight hundred seventeen".