52347661 has 4 divisors (see below), whose sum is σ = 53085024. Its totient is φ = 51610300.

The previous prime is 52347649. The next prime is 52347667. The reversal of 52347661 is 16674325.

It is a happy number.

52347661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 52347661 - 2⁵ = 52347629 is a prime.

It is a super-2 number, since 2×52347661² = 5480555224341842, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52347667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368575 + ... + 368716.

It is an arithmetic number, because the mean of its divisors is an integer number (13271256).

Almost surely, 2^52347661 is an apocalyptic number.

It is an amenable number.

52347661 is a deficient number, since it is larger than the sum of its proper divisors (737363).

52347661 is an equidigital number, since it uses as much as digits as its factorization.

52347661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737362.

The product of its digits is 30240, while the sum is 34.

The square root of 52347661 is about 7235.1683463483. The cubic root of 52347661 is about 374.0810947334.

It can be divided in two parts, 523476 and 61, that multiplied together give a triangular number (31932036 = T₇₉₉₁).

The spelling of 52347661 in words is "fifty-two million, three hundred forty-seven thousand, six hundred sixty-one".