1722774881 has 2 divisors, whose sum is σ = 1722774882. Its totient is φ = 1722774880.

The previous prime is 1722774853. The next prime is 1722774901. The reversal of 1722774881 is 1884772271.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1354902481 + 367872400 = 36809^2 + 19180^2 .

It is a cyclic number.

It is not a de Polignac number, because 1722774881 - 2⁶ = 1722774817 is a prime.

It is a super-2 number, since 2×1722774881² = 5935906581209128322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1722774481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861387440 + 861387441.

It is an arithmetic number, because the mean of its divisors is an integer number (861387441).

Almost surely, 2^1722774881 is an apocalyptic number.

It is an amenable number.

1722774881 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722774881 is an equidigital number, since it uses as much as digits as its factorization.

1722774881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 351232, while the sum is 47.

The square root of 1722774881 is about 41506.3233857204. The cubic root of 1722774881 is about 1198.7892605488.

The spelling of 1722774881 in words is "one billion, seven hundred twenty-two million, seven hundred seventy-four thousand, eight hundred eighty-one".