51606889 has 2 divisors, whose sum is σ = 51606890. Its totient is φ = 51606888.

The previous prime is 51606853. The next prime is 51606899. The reversal of 51606889 is 98860615.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47334400 + 4272489 = 6880^2 + 2067^2 .

It is a cyclic number.

It is not a de Polignac number, because 51606889 - 2²³ = 43218281 is a prime.

It is not a weakly prime, because it can be changed into another prime (51606899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25803444 + 25803445.

It is an arithmetic number, because the mean of its divisors is an integer number (25803445).

Almost surely, 2^51606889 is an apocalyptic number.

It is an amenable number.

51606889 is a deficient number, since it is larger than the sum of its proper divisors (1).

51606889 is an equidigital number, since it uses as much as digits as its factorization.

51606889 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 51606889 is about 7183.7934964752. The cubic root of 51606889 is about 372.3081642136.

The spelling of 51606889 in words is "fifty-one million, six hundred six thousand, eight hundred eighty-nine".