281949493 has 8 divisors (see below), whose sum is σ = 339187520. Its totient is φ = 228951360.

The previous prime is 281949469. The next prime is 281949511. The reversal of 281949493 is 394949182.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 281949493 - 2⁹ = 281948981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (281949293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1059828 + ... + 1060093.

It is an arithmetic number, because the mean of its divisors is an integer number (42398440).

Almost surely, 2^281949493 is an apocalyptic number.

It is an amenable number.

281949493 is a deficient number, since it is larger than the sum of its proper divisors (57238027).

281949493 is a wasteful number, since it uses less digits than its factorization.

281949493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2119947.

The product of its digits is 559872, while the sum is 49.

The square root of 281949493 is about 16791.3517323651. The cubic root of 281949493 is about 655.7280663564.

The spelling of 281949493 in words is "two hundred eighty-one million, nine hundred forty-nine thousand, four hundred ninety-three".