53439789 has 16 divisors (see below), whose sum is σ = 81248832. Its totient is φ = 30951168.

The previous prime is 53439767. The next prime is 53439791. The reversal of 53439789 is 98793435.

It is not a de Polignac number, because 53439789 - 2¹³ = 53431597 is a prime.

It is a super-2 number, since 2×53439789² = 5711622096729042, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53439709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39639 + ... + 40964.

It is an arithmetic number, because the mean of its divisors is an integer number (5078052).

Almost surely, 2^53439789 is an apocalyptic number.

It is an amenable number.

53439789 is a deficient number, since it is larger than the sum of its proper divisors (27809043).

53439789 is a wasteful number, since it uses less digits than its factorization.

53439789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80636.

The product of its digits is 816480, while the sum is 48.

The square root of 53439789 is about 7310.2523212267. The cubic root of 53439789 is about 376.6646916474.

The spelling of 53439789 in words is "fifty-three million, four hundred thirty-nine thousand, seven hundred eighty-nine".