69281489 has 2 divisors, whose sum is σ = 69281490. Its totient is φ = 69281488.

The previous prime is 69281461. The next prime is 69281503. The reversal of 69281489 is 98418296.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64529089 + 4752400 = 8033^2 + 2180^2 .

It is a cyclic number.

It is not a de Polignac number, because 69281489 - 2¹² = 69277393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69281419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34640744 + 34640745.

It is an arithmetic number, because the mean of its divisors is an integer number (34640745).

Almost surely, 2^69281489 is an apocalyptic number.

It is an amenable number.

69281489 is a deficient number, since it is larger than the sum of its proper divisors (1).

69281489 is an equidigital number, since it uses as much as digits as its factorization.

69281489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 47.

The square root of 69281489 is about 8323.5502641601. The cubic root of 69281489 is about 410.7135877680.

The spelling of 69281489 in words is "sixty-nine million, two hundred eighty-one thousand, four hundred eighty-nine".