138077497 has 8 divisors (see below), whose sum is σ = 143569800. Its totient is φ = 132633984.

The previous prime is 138077491. The next prime is 138077501. The reversal of 138077497 is 794770831.

138077497 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 102900736 + 35176761 = 10144^2 + 5931^2 .

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 138077497 - 2⁷ = 138077369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138077491) 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, 6372 + ... + 17797.

It is an arithmetic number, because the mean of its divisors is an integer number (17946225).

Almost surely, 2^138077497 is an apocalyptic number.

It is an amenable number.

138077497 is a deficient number, since it is larger than the sum of its proper divisors (5492303).

138077497 is a wasteful number, since it uses less digits than its factorization.

138077497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24395.

The product of its (nonzero) digits is 296352, while the sum is 46.

The square root of 138077497 is about 11750.6381528834. The cubic root of 138077497 is about 516.8616407851.

The spelling of 138077497 in words is "one hundred thirty-eight million, seventy-seven thousand, four hundred ninety-seven".