1154138473 has 2 divisors, whose sum is σ = 1154138474. Its totient is φ = 1154138472.

The previous prime is 1154138443. The next prime is 1154138501. The reversal of 1154138473 is 3748314511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 799079824 + 355058649 = 28268^2 + 18843^2 .

It is an emirp because it is prime and its reverse (3748314511) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1154138473 - 2⁹ = 1154137961 is a prime.

It is a super-2 number, since 2×1154138473² = 2664071229717543458, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1154138443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 577069236 + 577069237.

It is an arithmetic number, because the mean of its divisors is an integer number (577069237).

Almost surely, 2^1154138473 is an apocalyptic number.

It is an amenable number.

1154138473 is a deficient number, since it is larger than the sum of its proper divisors (1).

1154138473 is an equidigital number, since it uses as much as digits as its factorization.

1154138473 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 37.

The square root of 1154138473 is about 33972.6135732887. The cubic root of 1154138473 is about 1048.9448123655.

The spelling of 1154138473 in words is "one billion, one hundred fifty-four million, one hundred thirty-eight thousand, four hundred seventy-three".