53878739 has 4 divisors (see below), whose sum is σ = 54355656. Its totient is φ = 53401824.

The previous prime is 53878717. The next prime is 53878757. The reversal of 53878739 is 93787835.

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 53878739 - 2⁸ = 53878483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53878939) 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, 238289 + ... + 238514.

It is an arithmetic number, because the mean of its divisors is an integer number (13588914).

Almost surely, 2^53878739 is an apocalyptic number.

53878739 is a deficient number, since it is larger than the sum of its proper divisors (476917).

53878739 is a wasteful number, since it uses less digits than its factorization.

53878739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 476916.

The product of its digits is 1270080, while the sum is 50.

The square root of 53878739 is about 7340.2138252233. The cubic root of 53878739 is about 377.6931783233.

The spelling of 53878739 in words is "fifty-three million, eight hundred seventy-eight thousand, seven hundred thirty-nine".