138410977 has 4 divisors (see below), whose sum is σ = 138442500. Its totient is φ = 138379456.

The previous prime is 138410959. The next prime is 138410981. The reversal of 138410977 is 779014831.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 88341201 + 50069776 = 9399^2 + 7076^2 .

It is a cyclic number.

It is not a de Polignac number, because 138410977 - 2¹¹ = 138408929 is a prime.

It is a super-3 number, since 3×138410977³ (a number of 25 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138410927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7852 + ... + 18397.

It is an arithmetic number, because the mean of its divisors is an integer number (34610625).

Almost surely, 2^138410977 is an apocalyptic number.

It is an amenable number.

138410977 is a deficient number, since it is larger than the sum of its proper divisors (31523).

138410977 is an equidigital number, since it uses as much as digits as its factorization.

138410977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31522.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 138410977 is about 11764.8194631282. The cubic root of 138410977 is about 517.2774083742.

The spelling of 138410977 in words is "one hundred thirty-eight million, four hundred ten thousand, nine hundred seventy-seven".