1921134601 has 2 divisors, whose sum is σ = 1921134602. Its totient is φ = 1921134600.

The previous prime is 1921134529. The next prime is 1921134613. The reversal of 1921134601 is 1064311291.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1720175625 + 200958976 = 41475^2 + 14176^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1921134601 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1921134601.

It is not a weakly prime, because it can be changed into another prime (1921134641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 960567300 + 960567301.

It is an arithmetic number, because the mean of its divisors is an integer number (960567301).

Almost surely, 2^1921134601 is an apocalyptic number.

It is an amenable number.

1921134601 is a deficient number, since it is larger than the sum of its proper divisors (1).

1921134601 is an equidigital number, since it uses as much as digits as its factorization.

1921134601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1921134601 is about 43830.7494916525. The cubic root of 1921134601 is about 1243.1377784157.

Adding to 1921134601 its reverse (1064311291), we get a palindrome (2985445892).

The spelling of 1921134601 in words is "one billion, nine hundred twenty-one million, one hundred thirty-four thousand, six hundred one".