281902897 has 2 divisors, whose sum is σ = 281902898. Its totient is φ = 281902896.

The previous prime is 281902879. The next prime is 281902903. The reversal of 281902897 is 798209182.

Together with previous prime (281902879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226683136 + 55219761 = 15056^2 + 7431^2 .

It is a cyclic number.

It is not a de Polignac number, because 281902897 - 2⁷ = 281902769 is a prime.

It is not a weakly prime, because it can be changed into another prime (281902807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140951448 + 140951449.

It is an arithmetic number, because the mean of its divisors is an integer number (140951449).

Almost surely, 2^281902897 is an apocalyptic number.

It is an amenable number.

281902897 is a deficient number, since it is larger than the sum of its proper divisors (1).

281902897 is an equidigital number, since it uses as much as digits as its factorization.

281902897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 281902897 is about 16789.9641750660. The cubic root of 281902897 is about 655.6919416969.

It can be divided in two parts, 2819028 and 97, that added together give a triangular number (2819125 = T₂₃₇₄).

The spelling of 281902897 in words is "two hundred eighty-one million, nine hundred two thousand, eight hundred ninety-seven".