138301493 has 16 divisors (see below), whose sum is σ = 158241600. Its totient is φ = 119710080.

The previous prime is 138301483. The next prime is 138301529. The reversal of 138301493 is 394103831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 138301493 - 2⁸ = 138301237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138301403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20318 + ... + 26256.

It is an arithmetic number, because the mean of its divisors is an integer number (9890100).

Almost surely, 2^138301493 is an apocalyptic number.

It is an amenable number.

138301493 is a deficient number, since it is larger than the sum of its proper divisors (19940107).

138301493 is a wasteful number, since it uses less digits than its factorization.

138301493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6052.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 138301493 is about 11760.1655175427. The cubic root of 138301493 is about 517.1409824440.

The spelling of 138301493 in words is "one hundred thirty-eight million, three hundred one thousand, four hundred ninety-three".