138054997 has 4 divisors (see below), whose sum is σ = 142508416. Its totient is φ = 133601580.

The previous prime is 138054989. The next prime is 138055009. The reversal of 138054997 is 799450831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 799450831 = 263 ⋅3039737.

It is a cyclic number.

It is not a de Polignac number, because 138054997 - 2³ = 138054989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138034997) 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 in 3 ways as a sum of consecutive naturals, for example, 2226663 + ... + 2226724.

It is an arithmetic number, because the mean of its divisors is an integer number (35627104).

Almost surely, 2^138054997 is an apocalyptic number.

It is an amenable number.

138054997 is a deficient number, since it is larger than the sum of its proper divisors (4453419).

138054997 is an equidigital number, since it uses as much as digits as its factorization.

138054997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4453418.

The product of its (nonzero) digits is 272160, while the sum is 46.

The square root of 138054997 is about 11749.6807190664. The cubic root of 138054997 is about 516.8335647194.

The spelling of 138054997 in words is "one hundred thirty-eight million, fifty-four thousand, nine hundred ninety-seven".