281489701 has 2 divisors, whose sum is σ = 281489702. Its totient is φ = 281489700.

The previous prime is 281489683. The next prime is 281489729. The reversal of 281489701 is 107984182.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 273108676 + 8381025 = 16526^2 + 2895^2 .

It is a cyclic number.

It is not a de Polignac number, because 281489701 - 2⁵ = 281489669 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281480701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140744850 + 140744851.

It is an arithmetic number, because the mean of its divisors is an integer number (140744851).

Almost surely, 2^281489701 is an apocalyptic number.

It is an amenable number.

281489701 is a deficient number, since it is larger than the sum of its proper divisors (1).

281489701 is an equidigital number, since it uses as much as digits as its factorization.

281489701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 281489701 is about 16777.6548122793. The cubic root of 281489701 is about 655.3714273533.

The spelling of 281489701 in words is "two hundred eighty-one million, four hundred eighty-nine thousand, seven hundred one".