138503453 has 8 divisors (see below), whose sum is σ = 154780416. Its totient is φ = 122840800.

The previous prime is 138503429. The next prime is 138503461. The reversal of 138503453 is 354305831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138503453 - 2¹⁶ = 138437917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138503413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 153101 + ... + 154002.

It is an arithmetic number, because the mean of its divisors is an integer number (19347552).

Almost surely, 2^138503453 is an apocalyptic number.

It is an amenable number.

138503453 is a deficient number, since it is larger than the sum of its proper divisors (16276963).

138503453 is a wasteful number, since it uses less digits than its factorization.

138503453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307155.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 138503453 is about 11768.7489989378. The cubic root of 138503453 is about 517.3925849235.

The spelling of 138503453 in words is "one hundred thirty-eight million, five hundred three thousand, four hundred fifty-three".