51777889 has 2 divisors, whose sum is σ = 51777890. Its totient is φ = 51777888.

The previous prime is 51777883. The next prime is 51777893. The reversal of 51777889 is 98877715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51624225 + 153664 = 7185^2 + 392^2 .

It is a cyclic number.

It is not a de Polignac number, because 51777889 - 2⁵ = 51777857 is a prime.

It is not a weakly prime, because it can be changed into another prime (51777883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25888944 + 25888945.

It is an arithmetic number, because the mean of its divisors is an integer number (25888945).

Almost surely, 2^51777889 is an apocalyptic number.

It is an amenable number.

51777889 is a deficient number, since it is larger than the sum of its proper divisors (1).

51777889 is an equidigital number, since it uses as much as digits as its factorization.

51777889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 987840, while the sum is 52.

The square root of 51777889 is about 7195.6854433751. The cubic root of 51777889 is about 372.7189266045.

The spelling of 51777889 in words is "fifty-one million, seven hundred seventy-seven thousand, eight hundred eighty-nine".