12551779 has 2 divisors, whose sum is σ = 12551780. Its totient is φ = 12551778.

The previous prime is 12551753. The next prime is 12551783. The reversal of 12551779 is 97715521.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12551779 - 2²³ = 4163171 is a prime.

It is not a weakly prime, because it can be changed into another prime (12551789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6275889 + 6275890.

It is an arithmetic number, because the mean of its divisors is an integer number (6275890).

Almost surely, 2^12551779 is an apocalyptic number.

12551779 is a deficient number, since it is larger than the sum of its proper divisors (1).

12551779 is an equidigital number, since it uses as much as digits as its factorization.

12551779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 22050, while the sum is 37.

The square root of 12551779 is about 3542.8489948063. The cubic root of 12551779 is about 232.3994493328.

The spelling of 12551779 in words is "twelve million, five hundred fifty-one thousand, seven hundred seventy-nine".