138632801 has 2 divisors, whose sum is σ = 138632802. Its totient is φ = 138632800.

The previous prime is 138632779. The next prime is 138632803. The reversal of 138632801 is 108236831.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70140625 + 68492176 = 8375^2 + 8276^2 .

It is an emirp because it is prime and its reverse (108236831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 138632801 - 2⁶ = 138632737 is a prime.

Together with 138632803, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (138632803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69316400 + 69316401.

It is an arithmetic number, because the mean of its divisors is an integer number (69316401).

Almost surely, 2^138632801 is an apocalyptic number.

It is an amenable number.

138632801 is a deficient number, since it is larger than the sum of its proper divisors (1).

138632801 is an equidigital number, since it uses as much as digits as its factorization.

138632801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 138632801 is about 11774.2431179248. The cubic root of 138632801 is about 517.5535986555.

The spelling of 138632801 in words is "one hundred thirty-eight million, six hundred thirty-two thousand, eight hundred one".