1119664621 has 2 divisors, whose sum is σ = 1119664622. Its totient is φ = 1119664620.

The previous prime is 1119664517. The next prime is 1119664673. The reversal of 1119664621 is 1264669111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 906913225 + 212751396 = 30115^2 + 14586^2 .

It is a cyclic number.

It is not a de Polignac number, because 1119664621 - 2¹¹ = 1119662573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1119664921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 559832310 + 559832311.

It is an arithmetic number, because the mean of its divisors is an integer number (559832311).

Almost surely, 2^1119664621 is an apocalyptic number.

It is an amenable number.

1119664621 is a deficient number, since it is larger than the sum of its proper divisors (1).

1119664621 is an equidigital number, since it uses as much as digits as its factorization.

1119664621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15552, while the sum is 37.

The square root of 1119664621 is about 33461.3900040031. The cubic root of 1119664621 is about 1038.3951520767.

The spelling of 1119664621 in words is "one billion, one hundred nineteen million, six hundred sixty-four thousand, six hundred twenty-one".