138495777 has 8 divisors (see below), whose sum is σ = 211041216. Its totient is φ = 79140432.

The previous prime is 138495761. The next prime is 138495779. The reversal of 138495777 is 777594831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 138495777 - 2⁴ = 138495761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138495779) 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, 3297498 + ... + 3297539.

It is an arithmetic number, because the mean of its divisors is an integer number (26380152).

Almost surely, 2^138495777 is an apocalyptic number.

It is an amenable number.

138495777 is a deficient number, since it is larger than the sum of its proper divisors (72545439).

138495777 is an equidigital number, since it uses as much as digits as its factorization.

138495777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6595047.

The product of its digits is 1481760, while the sum is 51.

The square root of 138495777 is about 11768.4228764945. The cubic root of 138495777 is about 517.3830266086.

The spelling of 138495777 in words is "one hundred thirty-eight million, four hundred ninety-five thousand, seven hundred seventy-seven".