138776954 has 4 divisors (see below), whose sum is σ = 208165434. Its totient is φ = 69388476.

The previous prime is 138776941. The next prime is 138776993. The reversal of 138776954 is 459677831.

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

It can be written as a sum of positive squares in only one way, i.e., 128709025 + 10067929 = 11345^2 + 3173^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34694237 + ... + 34694240.

Almost surely, 2^138776954 is an apocalyptic number.

138776954 is a deficient number, since it is larger than the sum of its proper divisors (69388480).

138776954 is an equidigital number, since it uses as much as digits as its factorization.

138776954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69388479.

The product of its digits is 1270080, while the sum is 50.

The square root of 138776954 is about 11780.3630674101. The cubic root of 138776954 is about 517.7329238442.

The spelling of 138776954 in words is "one hundred thirty-eight million, seven hundred seventy-six thousand, nine hundred fifty-four".