138752101 has 2 divisors, whose sum is σ = 138752102. Its totient is φ = 138752100.

The previous prime is 138752087. The next prime is 138752111. The reversal of 138752101 is 101257831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 136188900 + 2563201 = 11670^2 + 1601^2 .

It is a cyclic number.

It is not a de Polignac number, because 138752101 - 2⁹ = 138751589 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 138752101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138752111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69376050 + 69376051.

It is an arithmetic number, because the mean of its divisors is an integer number (69376051).

Almost surely, 2^138752101 is an apocalyptic number.

It is an amenable number.

138752101 is a deficient number, since it is larger than the sum of its proper divisors (1).

138752101 is an equidigital number, since it uses as much as digits as its factorization.

138752101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 138752101 is about 11779.3081715354. The cubic root of 138752101 is about 517.7020157715.

The spelling of 138752101 in words is "one hundred thirty-eight million, seven hundred fifty-two thousand, one hundred one".