138202001 has 24 divisors (see below), whose sum is σ = 164324160. Its totient is φ = 115873632.

The previous prime is 138201979. The next prime is 138202063. The reversal of 138202001 is 100202831.

It is not a de Polignac number, because 138202001 - 2²² = 134007697 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138202601) 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 23 ways as a sum of consecutive naturals, for example, 701435 + ... + 701631.

It is an arithmetic number, because the mean of its divisors is an integer number (6846840).

Almost surely, 2^138202001 is an apocalyptic number.

It is an amenable number.

138202001 is a deficient number, since it is larger than the sum of its proper divisors (26122159).

138202001 is a wasteful number, since it uses less digits than its factorization.

138202001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453 (or 446 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 138202001 is about 11755.9347140072. The cubic root of 138202001 is about 517.0169448982.

Adding to 138202001 its reverse (100202831), we get a palindrome (238404832).

The spelling of 138202001 in words is "one hundred thirty-eight million, two hundred two thousand, one".