138270749 has 2 divisors, whose sum is σ = 138270750. Its totient is φ = 138270748.

The previous prime is 138270731. The next prime is 138270767. The reversal of 138270749 is 947072831.

138270749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (138270731) and next prime (138270767).

It can be written as a sum of positive squares in only one way, i.e., 130188100 + 8082649 = 11410^2 + 2843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-138270749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (138270719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69135374 + 69135375.

It is an arithmetic number, because the mean of its divisors is an integer number (69135375).

Almost surely, 2^138270749 is an apocalyptic number.

It is an amenable number.

138270749 is a deficient number, since it is larger than the sum of its proper divisors (1).

138270749 is an equidigital number, since it uses as much as digits as its factorization.

138270749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 138270749 is about 11758.8583204323. The cubic root of 138270749 is about 517.1026599833.

The spelling of 138270749 in words is "one hundred thirty-eight million, two hundred seventy thousand, seven hundred forty-nine".