53720191 has 8 divisors (see below), whose sum is σ = 61477920. Its totient is φ = 45983328.

The previous prime is 53720167. The next prime is 53720197. The reversal of 53720191 is 19102735.

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 53720191 - 2⁷ = 53720063 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53720197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 765 + ... + 10393.

It is an arithmetic number, because the mean of its divisors is an integer number (7684740).

Almost surely, 2^53720191 is an apocalyptic number.

53720191 is a deficient number, since it is larger than the sum of its proper divisors (7757729).

53720191 is an equidigital number, since it uses as much as digits as its factorization.

53720191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10433.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 53720191 is about 7329.4059104405. The cubic root of 53720191 is about 377.3223373463.

The spelling of 53720191 in words is "fifty-three million, seven hundred twenty thousand, one hundred ninety-one".