138776297 has 4 divisors (see below), whose sum is σ = 151392336. Its totient is φ = 126160260.

The previous prime is 138776237. The next prime is 138776299. The reversal of 138776297 is 792677831.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 792677831 = 11 ⋅72061621.

It is a cyclic number.

It is not a de Polignac number, because 138776297 - 2⁸ = 138776041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138776299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6308003 + ... + 6308024.

It is an arithmetic number, because the mean of its divisors is an integer number (37848084).

Almost surely, 2^138776297 is an apocalyptic number.

It is an amenable number.

138776297 is a deficient number, since it is larger than the sum of its proper divisors (12616039).

138776297 is a wasteful number, since it uses less digits than its factorization.

138776297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12616038.

The product of its digits is 889056, while the sum is 50.

The square root of 138776297 is about 11780.3351819887. The cubic root of 138776297 is about 517.7321068232.

The spelling of 138776297 in words is "one hundred thirty-eight million, seven hundred seventy-six thousand, two hundred ninety-seven".