1911398441 has 2 divisors, whose sum is σ = 1911398442. Its totient is φ = 1911398440.

The previous prime is 1911398389. The next prime is 1911398449. The reversal of 1911398441 is 1448931191.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1766436841 + 144961600 = 42029^2 + 12040^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1911398441 is a prime.

It is not a weakly prime, because it can be changed into another prime (1911398449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 955699220 + 955699221.

It is an arithmetic number, because the mean of its divisors is an integer number (955699221).

Almost surely, 2^1911398441 is an apocalyptic number.

It is an amenable number.

1911398441 is a deficient number, since it is larger than the sum of its proper divisors (1).

1911398441 is an equidigital number, since it uses as much as digits as its factorization.

1911398441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 41.

The square root of 1911398441 is about 43719.5430099629. The cubic root of 1911398441 is about 1241.0341790790.

The spelling of 1911398441 in words is "one billion, nine hundred eleven million, three hundred ninety-eight thousand, four hundred forty-one".