53545997 has 4 divisors (see below), whose sum is σ = 53931360. Its totient is φ = 53160636.

The previous prime is 53545991. The next prime is 53546027. The reversal of 53545997 is 79954535.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 79954535 = 5 ⋅15990907.

It is a cyclic number.

It is not a de Polignac number, because 53545997 - 2¹⁰ = 53544973 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 (53545991) 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, 192473 + ... + 192750.

It is an arithmetic number, because the mean of its divisors is an integer number (13482840).

Almost surely, 2^53545997 is an apocalyptic number.

It is an amenable number.

53545997 is a deficient number, since it is larger than the sum of its proper divisors (385363).

53545997 is a wasteful number, since it uses less digits than its factorization.

53545997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385362.

The product of its digits is 850500, while the sum is 47.

The square root of 53545997 is about 7317.5130338114. The cubic root of 53545997 is about 376.9140584660.

The spelling of 53545997 in words is "fifty-three million, five hundred forty-five thousand, nine hundred ninety-seven".