1954111603 has 2 divisors, whose sum is σ = 1954111604. Its totient is φ = 1954111602.

The previous prime is 1954111591. The next prime is 1954111609. The reversal of 1954111603 is 3061114591.

It is a strong prime.

It is an emirp because it is prime and its reverse (3061114591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1954111603 - 2⁹ = 1954111091 is a prime.

It is not a weakly prime, because it can be changed into another prime (1954111609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 977055801 + 977055802.

It is an arithmetic number, because the mean of its divisors is an integer number (977055802).

Almost surely, 2^1954111603 is an apocalyptic number.

1954111603 is a deficient number, since it is larger than the sum of its proper divisors (1).

1954111603 is an equidigital number, since it uses as much as digits as its factorization.

1954111603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 31.

The square root of 1954111603 is about 44205.3345536486. The cubic root of 1954111603 is about 1250.2104398767.

The spelling of 1954111603 in words is "one billion, nine hundred fifty-four million, one hundred eleven thousand, six hundred three".