51669089 has 2 divisors, whose sum is σ = 51669090. Its totient is φ = 51669088.

The previous prime is 51669067. The next prime is 51669091. The reversal of 51669089 is 98096615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44422225 + 7246864 = 6665^2 + 2692^2 .

It is a cyclic number.

It is not a de Polignac number, because 51669089 - 2¹² = 51664993 is a prime.

Together with 51669091, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51669019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25834544 + 25834545.

It is an arithmetic number, because the mean of its divisors is an integer number (25834545).

Almost surely, 2^51669089 is an apocalyptic number.

It is an amenable number.

51669089 is a deficient number, since it is larger than the sum of its proper divisors (1).

51669089 is an equidigital number, since it uses as much as digits as its factorization.

51669089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 51669089 is about 7188.1213818355. The cubic root of 51669089 is about 372.4576808822.

The spelling of 51669089 in words is "fifty-one million, six hundred sixty-nine thousand, eighty-nine".