53857391 has 8 divisors (see below), whose sum is σ = 61965600. Its totient is φ = 45852768.

The previous prime is 53857373. The next prime is 53857451. The reversal of 53857391 is 19375835.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53857391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53857351) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24776 + ... + 26861.

It is an arithmetic number, because the mean of its divisors is an integer number (7745700).

Almost surely, 2^53857391 is an apocalyptic number.

53857391 is a deficient number, since it is larger than the sum of its proper divisors (8108209).

53857391 is a wasteful number, since it uses less digits than its factorization.

53857391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51793.

The product of its digits is 113400, while the sum is 41.

The square root of 53857391 is about 7338.7595000790. The cubic root of 53857391 is about 377.6432881485.

The spelling of 53857391 in words is "fifty-three million, eight hundred fifty-seven thousand, three hundred ninety-one".