52977139 has 4 divisors (see below), whose sum is σ = 53065024. Its totient is φ = 52889256.

The previous prime is 52977121. The next prime is 52977143. The reversal of 52977139 is 93177925.

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

It is a cyclic number.

It is not a de Polignac number, because 52977139 - 2⁷ = 52977011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 52977095 and 52977104.

It is not an unprimeable number, because it can be changed into a prime (52977539) 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, 43032 + ... + 44245.

It is an arithmetic number, because the mean of its divisors is an integer number (13266256).

Almost surely, 2^52977139 is an apocalyptic number.

52977139 is a deficient number, since it is larger than the sum of its proper divisors (87885).

52977139 is an equidigital number, since it uses as much as digits as its factorization.

52977139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87884.

The product of its digits is 119070, while the sum is 43.

The square root of 52977139 is about 7278.5396200062. The cubic root of 52977139 is about 375.5745598257.

The spelling of 52977139 in words is "fifty-two million, nine hundred seventy-seven thousand, one hundred thirty-nine".