55977393 has 4 divisors (see below), whose sum is σ = 74636528. Its totient is φ = 37318260.

The previous prime is 55977373. The next prime is 55977407. The reversal of 55977393 is 39377955.

55977393 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 not a de Polignac number, because 55977393 - 2¹³ = 55969201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55977343) 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, 9329563 + ... + 9329568.

It is an arithmetic number, because the mean of its divisors is an integer number (18659132).

Almost surely, 2^55977393 is an apocalyptic number.

It is an amenable number.

55977393 is a deficient number, since it is larger than the sum of its proper divisors (18659135).

55977393 is a wasteful number, since it uses less digits than its factorization.

55977393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18659134.

The product of its digits is 893025, while the sum is 48.

The square root of 55977393 is about 7481.8041273479. The cubic root of 55977393 is about 382.5347467260.

The spelling of 55977393 in words is "fifty-five million, nine hundred seventy-seven thousand, three hundred ninety-three".