138053997 has 8 divisors (see below), whose sum is σ = 204524480. Its totient is φ = 92035980.

The previous prime is 138053987. The next prime is 138053999. The reversal of 138053997 is 799350831.

It is a happy number.

It is not a de Polignac number, because 138053997 - 2⁶ = 138053933 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 (138053999) 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 7 ways as a sum of consecutive naturals, for example, 2556529 + ... + 2556582.

It is an arithmetic number, because the mean of its divisors is an integer number (25565560).

Almost surely, 2^138053997 is an apocalyptic number.

It is an amenable number.

138053997 is a deficient number, since it is larger than the sum of its proper divisors (66470483).

138053997 is an equidigital number, since it uses as much as digits as its factorization.

138053997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5113120 (or 5113114 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 138053997 is about 11749.6381646415. The cubic root of 138053997 is about 516.8323168234.

The spelling of 138053997 in words is "one hundred thirty-eight million, fifty-three thousand, nine hundred ninety-seven".