1190913421 has 2 divisors, whose sum is σ = 1190913422. Its totient is φ = 1190913420.

The previous prime is 1190913419. The next prime is 1190913491. The reversal of 1190913421 is 1243190911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1170392521 + 20520900 = 34211^2 + 4530^2 .

It is an emirp because it is prime and its reverse (1243190911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1190913421 - 2¹ = 1190913419 is a prime.

Together with 1190913419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1190913491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 595456710 + 595456711.

It is an arithmetic number, because the mean of its divisors is an integer number (595456711).

Almost surely, 2^1190913421 is an apocalyptic number.

It is an amenable number.

1190913421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1190913421 is an equidigital number, since it uses as much as digits as its factorization.

1190913421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 31.

The square root of 1190913421 is about 34509.6134577019. The cubic root of 1190913421 is about 1059.9695674780.

The spelling of 1190913421 in words is "one billion, one hundred ninety million, nine hundred thirteen thousand, four hundred twenty-one".