53387391 has 8 divisors (see below), whose sum is σ = 71321904. Its totient is φ = 35522240.

The previous prime is 53387387. The next prime is 53387401. The reversal of 53387391 is 19378335.

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

It is a cyclic number.

It is not a de Polignac number, because 53387391 - 2² = 53387387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53387311) 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, 15516 + ... + 18641.

It is an arithmetic number, because the mean of its divisors is an integer number (8915238).

Almost surely, 2^53387391 is an apocalyptic number.

53387391 is a deficient number, since it is larger than the sum of its proper divisors (17934513).

53387391 is a wasteful number, since it uses less digits than its factorization.

53387391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34681.

The product of its digits is 68040, while the sum is 39.

The square root of 53387391 is about 7306.6675714720. The cubic root of 53387391 is about 376.5415441389.

The spelling of 53387391 in words is "fifty-three million, three hundred eighty-seven thousand, three hundred ninety-one".