1722774901 has 2 divisors, whose sum is σ = 1722774902. Its totient is φ = 1722774900.

The previous prime is 1722774881. The next prime is 1722774947. The reversal of 1722774901 is 1094772271.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1039998001 + 682776900 = 32249^2 + 26130^2 .

It is a cyclic number.

It is not a de Polignac number, because 1722774901 - 2¹¹ = 1722772853 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1722774971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 861387450 + 861387451.

It is an arithmetic number, because the mean of its divisors is an integer number (861387451).

Almost surely, 2^1722774901 is an apocalyptic number.

It is an amenable number.

1722774901 is a deficient number, since it is larger than the sum of its proper divisors (1).

1722774901 is an equidigital number, since it uses as much as digits as its factorization.

1722774901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 49392, while the sum is 40.

The square root of 1722774901 is about 41506.3236266475. The cubic root of 1722774901 is about 1198.7892651878.

The spelling of 1722774901 in words is "one billion, seven hundred twenty-two million, seven hundred seventy-four thousand, nine hundred one".