120138877 has 4 divisors (see below), whose sum is σ = 120563680. Its totient is φ = 119714076.

The previous prime is 120138871. The next prime is 120138899. The reversal of 120138877 is 778831021.

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: 778831021 = 71 ⋅10969451.

It is a cyclic number.

It is not a de Polignac number, because 120138877 - 2⁷ = 120138749 is a prime.

It is a super-2 number, since 2×120138877² = 28866699533642258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120138871) 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, 211977 + ... + 212542.

It is an arithmetic number, because the mean of its divisors is an integer number (30140920).

Almost surely, 2^120138877 is an apocalyptic number.

It is an amenable number.

120138877 is a deficient number, since it is larger than the sum of its proper divisors (424803).

120138877 is an equidigital number, since it uses as much as digits as its factorization.

120138877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 424802.

The product of its (nonzero) digits is 18816, while the sum is 37.

The square root of 120138877 is about 10960.7881559676. The cubic root of 120138877 is about 493.4326193622.

Adding to 120138877 its reverse (778831021), we get a palindrome (898969898).

The spelling of 120138877 in words is "one hundred twenty million, one hundred thirty-eight thousand, eight hundred seventy-seven".