281009049 has 4 divisors (see below), whose sum is σ = 374678736. Its totient is φ = 187339364.

The previous prime is 281008943. The next prime is 281009051. The reversal of 281009049 is 940900182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 281009049 - 2¹² = 281004953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (281009059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46834839 + ... + 46834844.

It is an arithmetic number, because the mean of its divisors is an integer number (93669684).

Almost surely, 2^281009049 is an apocalyptic number.

It is an amenable number.

281009049 is a deficient number, since it is larger than the sum of its proper divisors (93669687).

281009049 is an equidigital number, since it uses as much as digits as its factorization.

281009049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93669686.

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 281009049 is about 16763.3245211086. The cubic root of 281009049 is about 654.9981927965.

The spelling of 281009049 in words is "two hundred eighty-one million, nine thousand, forty-nine".