53653391 has 4 divisors (see below), whose sum is σ = 58530984. Its totient is φ = 48775800.

The previous prime is 53653387. The next prime is 53653423. The reversal of 53653391 is 19335635.

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 53653391 - 2² = 53653387 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 (53653091) 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, 2438780 + ... + 2438801.

It is an arithmetic number, because the mean of its divisors is an integer number (14632746).

Almost surely, 2^53653391 is an apocalyptic number.

53653391 is a deficient number, since it is larger than the sum of its proper divisors (4877593).

53653391 is a wasteful number, since it uses less digits than its factorization.

53653391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4877592.

The product of its digits is 36450, while the sum is 35.

The square root of 53653391 is about 7324.8475069451. The cubic root of 53653391 is about 377.1658748428.

The spelling of 53653391 in words is "fifty-three million, six hundred fifty-three thousand, three hundred ninety-one".