52720737 has 4 divisors (see below), whose sum is σ = 70294320. Its totient is φ = 35147156.

The previous prime is 52720697. The next prime is 52720741. The reversal of 52720737 is 73702725.

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.

It is a cyclic number.

It is not a de Polignac number, because 52720737 - 2¹¹ = 52718689 is a prime.

It is a super-2 number, since 2×52720737² = 5558952219646338, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 52720698 and 52720707.

It is not an unprimeable number, because it can be changed into a prime (52720747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8786787 + ... + 8786792.

It is an arithmetic number, because the mean of its divisors is an integer number (17573580).

Almost surely, 2^52720737 is an apocalyptic number.

It is an amenable number.

52720737 is a deficient number, since it is larger than the sum of its proper divisors (17573583).

52720737 is a wasteful number, since it uses less digits than its factorization.

52720737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17573582.

The product of its (nonzero) digits is 20580, while the sum is 33.

The square root of 52720737 is about 7260.9046956974. The cubic root of 52720737 is about 374.9676701017.

The spelling of 52720737 in words is "fifty-two million, seven hundred twenty thousand, seven hundred thirty-seven".