1801078897 has 2 divisors, whose sum is σ = 1801078898. Its totient is φ = 1801078896.

The previous prime is 1801078879. The next prime is 1801078907. The reversal of 1801078897 is 7988701081.

Together with previous prime (1801078879) 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., 1510410496 + 290668401 = 38864^2 + 17049^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1801078897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1801078897.

It is not a weakly prime, because it can be changed into another prime (1801078297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 900539448 + 900539449.

It is an arithmetic number, because the mean of its divisors is an integer number (900539449).

Almost surely, 2^1801078897 is an apocalyptic number.

It is an amenable number.

1801078897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1801078897 is an equidigital number, since it uses as much as digits as its factorization.

1801078897 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 49.

The square root of 1801078897 is about 42439.1198895547. The cubic root of 1801078897 is about 1216.6833901832.

The spelling of 1801078897 in words is "one billion, eight hundred one million, seventy-eight thousand, eight hundred ninety-seven".