54139903 has 2 divisors, whose sum is σ = 54139904. Its totient is φ = 54139902.

The previous prime is 54139867. The next prime is 54139909. The reversal of 54139903 is 30993145.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54139903 is a prime.

It is a super-2 number, since 2×54139903² = 5862258193698818, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54139909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27069951 + 27069952.

It is an arithmetic number, because the mean of its divisors is an integer number (27069952).

Almost surely, 2^54139903 is an apocalyptic number.

54139903 is a deficient number, since it is larger than the sum of its proper divisors (1).

54139903 is an equidigital number, since it uses as much as digits as its factorization.

54139903 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14580, while the sum is 34.

The square root of 54139903 is about 7357.9822641809. The cubic root of 54139903 is about 378.3024533567.

The spelling of 54139903 in words is "fifty-four million, one hundred thirty-nine thousand, nine hundred three".