138045649 has 8 divisors (see below), whose sum is σ = 157923648. Its totient is φ = 118206960.

The previous prime is 138045637. The next prime is 138045653. The reversal of 138045649 is 946540831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 138045649 - 2¹³ = 138037457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138045619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1867 + ... + 16720.

It is an arithmetic number, because the mean of its divisors is an integer number (19740456).

Almost surely, 2^138045649 is an apocalyptic number.

It is an amenable number.

138045649 is a deficient number, since it is larger than the sum of its proper divisors (19877999).

138045649 is a wasteful number, since it uses less digits than its factorization.

138045649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19655.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 138045649 is about 11749.2829142889. The cubic root of 138045649 is about 516.8218991529.

The spelling of 138045649 in words is "one hundred thirty-eight million, forty-five thousand, six hundred forty-nine".