55779793 has 2 divisors, whose sum is σ = 55779794. Its totient is φ = 55779792.

The previous prime is 55779791. The next prime is 55779809. The reversal of 55779793 is 39797755.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42406144 + 13373649 = 6512^2 + 3657^2 .

It is a cyclic number.

It is not a de Polignac number, because 55779793 - 2¹ = 55779791 is a prime.

It is a super-2 number, since 2×55779793² = 6222770614245698, which contains 22 as substring.

Together with 55779791, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 55779793.

It is not a weakly prime, because it can be changed into another prime (55779791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27889896 + 27889897.

It is an arithmetic number, because the mean of its divisors is an integer number (27889897).

Almost surely, 2^55779793 is an apocalyptic number.

It is an amenable number.

55779793 is a deficient number, since it is larger than the sum of its proper divisors (1).

55779793 is an equidigital number, since it uses as much as digits as its factorization.

55779793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2083725, while the sum is 52.

The square root of 55779793 is about 7468.5870819051. The cubic root of 55779793 is about 382.0841006137.

The spelling of 55779793 in words is "fifty-five million, seven hundred seventy-nine thousand, seven hundred ninety-three".