55961393 has 4 divisors (see below), whose sum is σ = 55984500. Its totient is φ = 55938288.

The previous prime is 55961377. The next prime is 55961401. The reversal of 55961393 is 39316955.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 39316955 = 5 ⋅7863391.

It can be written as a sum of positive squares in 2 ways, for example, as 18421264 + 37540129 = 4292^2 + 6127^2 .

It is a cyclic number.

It is not a de Polignac number, because 55961393 - 2⁴ = 55961377 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55961393.

It is not an unprimeable number, because it can be changed into a prime (55961303) 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, 7430 + ... + 12927.

It is an arithmetic number, because the mean of its divisors is an integer number (13996125).

Almost surely, 2^55961393 is an apocalyptic number.

It is an amenable number.

55961393 is a deficient number, since it is larger than the sum of its proper divisors (23107).

55961393 is a wasteful number, since it uses less digits than its factorization.

55961393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23106.

The product of its digits is 109350, while the sum is 41.

The square root of 55961393 is about 7480.7347901125. The cubic root of 55961393 is about 382.4982966589.

The spelling of 55961393 in words is "fifty-five million, nine hundred sixty-one thousand, three hundred ninety-three".