1954665211 has 2 divisors, whose sum is σ = 1954665212. Its totient is φ = 1954665210.

The previous prime is 1954665199. The next prime is 1954665217. The reversal of 1954665211 is 1125664591.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1954665211 - 2²⁷ = 1820447483 is a prime.

It is not a weakly prime, because it can be changed into another prime (1954665217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977332605 + 977332606.

It is an arithmetic number, because the mean of its divisors is an integer number (977332606).

Almost surely, 2^1954665211 is an apocalyptic number.

1954665211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954665211 is an equidigital number, since it uses as much as digits as its factorization.

1954665211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64800, while the sum is 40.

The square root of 1954665211 is about 44211.5958884092. The cubic root of 1954665211 is about 1250.3284920135.

The spelling of 1954665211 in words is "one billion, nine hundred fifty-four million, six hundred sixty-five thousand, two hundred eleven".