53704391 has 4 divisors (see below), whose sum is σ = 57835512. Its totient is φ = 49573272.

The previous prime is 53704351. The next prime is 53704397. The reversal of 53704391 is 19340735.

It is a happy number.

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 53704391 - 2⁶ = 53704327 is a prime.

It is a super-2 number, since 2×53704391² = 5768323225361762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53704397) 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, 2065541 + ... + 2065566.

It is an arithmetic number, because the mean of its divisors is an integer number (14458878).

Almost surely, 2^53704391 is an apocalyptic number.

53704391 is a deficient number, since it is larger than the sum of its proper divisors (4131121).

53704391 is a wasteful number, since it uses less digits than its factorization.

53704391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4131120.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 53704391 is about 7328.3279811973. The cubic root of 53704391 is about 377.2853414645.

The spelling of 53704391 in words is "fifty-three million, seven hundred four thousand, three hundred ninety-one".