138277773 has 20 divisors (see below), whose sum is σ = 207380448. Its totient is φ = 91820520.

The previous prime is 138277759. The next prime is 138277823. The reversal of 138277773 is 377772831.

It is not a de Polignac number, because 138277773 - 2¹⁶ = 138212237 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138277703) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18058 + ... + 24548.

Almost surely, 2^138277773 is an apocalyptic number.

It is an amenable number.

138277773 is a deficient number, since it is larger than the sum of its proper divisors (69102675).

138277773 is an equidigital number, since it uses as much as digits as its factorization.

138277773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6766 (or 6757 counting only the distinct ones).

The product of its digits is 345744, while the sum is 45.

The square root of 138277773 is about 11759.1569850904. The cubic root of 138277773 is about 517.1114159147. Note that the first 3 decimals are identical.

The spelling of 138277773 in words is "one hundred thirty-eight million, two hundred seventy-seven thousand, seven hundred seventy-three".