53640975 has 24 divisors (see below), whose sum is σ = 89025552. Its totient is φ = 28499200.

The previous prime is 53640973. The next prime is 53641031. The reversal of 53640975 is 57904635.

It is a Cunningham number, because it is equal to 7324²-1.

It is not a de Polignac number, because 53640975 - 2¹ = 53640973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53640973) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20755 + ... + 23195.

It is an arithmetic number, because the mean of its divisors is an integer number (3709398).

Almost surely, 2^53640975 is an apocalyptic number.

53640975 is a deficient number, since it is larger than the sum of its proper divisors (35384577).

53640975 is a wasteful number, since it uses less digits than its factorization.

53640975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2747 (or 2742 counting only the distinct ones).

The product of its (nonzero) digits is 113400, while the sum is 39.

The square root of 53640975 is about 7323.9999317313. Note that the first 4 decimals coincide. The cubic root of 53640975 is about 377.1367791187.

It can be divided in two parts, 53640 and 975, that added together give a triangular number (54615 = T₃₃₀).

The spelling of 53640975 in words is "fifty-three million, six hundred forty thousand, nine hundred seventy-five".