138719747401 has 3 divisors (see below), whose sum is σ = 138720119853. Its totient is φ = 138719374950.

The previous prime is 138719747399. The next prime is 138719747417. The reversal of 138719747401 is 104747917831.

The square root of 138719747401 is 372451.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 104747917831 = 23 ⋅4554257297.

It is not a de Polignac number, because 138719747401 - 2¹ = 138719747399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138719742401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 186226 + ... + 558676.

It is an arithmetic number, because the mean of its divisors is an integer number (46240039951).

Almost surely, 2^138719747401 is an apocalyptic number.

138719747401 is the 372451-st square number.

138719747401 is the 186226-th centered octagonal number.

It is an amenable number.

138719747401 is a deficient number, since it is larger than the sum of its proper divisors (372452).

138719747401 is an frugal number, since it uses more digits than its factorization.

138719747401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 744902 (or 372451 counting only the distinct ones).

The product of its (nonzero) digits is 1185408, while the sum is 52.

The spelling of 138719747401 in words is "one hundred thirty-eight billion, seven hundred nineteen million, seven hundred forty-seven thousand, four hundred one".