53439977 has 4 divisors (see below), whose sum is σ = 53622660. Its totient is φ = 53257296.

The previous prime is 53439941. The next prime is 53439979. The reversal of 53439977 is 77993435.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 50993881 + 2446096 = 7141^2 + 1564^2 .

It is a cyclic number.

It is not a de Polignac number, because 53439977 - 2²² = 49245673 is a prime.

It is a super-2 number, since 2×53439977² = 5711662283521058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53439979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90902 + ... + 91487.

It is an arithmetic number, because the mean of its divisors is an integer number (13405665).

Almost surely, 2^53439977 is an apocalyptic number.

It is an amenable number.

53439977 is a deficient number, since it is larger than the sum of its proper divisors (182683).

53439977 is a wasteful number, since it uses less digits than its factorization.

53439977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182682.

The product of its digits is 714420, while the sum is 47.

The square root of 53439977 is about 7310.2651798686. The cubic root of 53439977 is about 376.6651333462.

The spelling of 53439977 in words is "fifty-three million, four hundred thirty-nine thousand, nine hundred seventy-seven".