138771501 has 16 divisors (see below), whose sum is σ = 202214208. Its totient is φ = 83952000.

The previous prime is 138771491. The next prime is 138771509. The reversal of 138771501 is 105177831.

It is not a de Polignac number, because 138771501 - 2¹³ = 138763309 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138771509) 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 15 ways as a sum of consecutive naturals, for example, 16335 + ... + 23331.

It is an arithmetic number, because the mean of its divisors is an integer number (12638388).

Almost surely, 2^138771501 is an apocalyptic number.

138771501 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

138771501 is a deficient number, since it is larger than the sum of its proper divisors (63442707).

138771501 is a wasteful number, since it uses less digits than its factorization.

138771501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7612.

The product of its (nonzero) digits is 5880, while the sum is 33.

The square root of 138771501 is about 11780.1316206569. The cubic root of 138771501 is about 517.7261426160.

The spelling of 138771501 in words is "one hundred thirty-eight million, seven hundred seventy-one thousand, five hundred one".