281429387 has 4 divisors (see below), whose sum is σ = 296241480. Its totient is φ = 266617296.

The previous prime is 281429353. The next prime is 281429399. The reversal of 281429387 is 783924182.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 281429387 - 2¹⁴ = 281413003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281429327) 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, 7406018 + ... + 7406055.

It is an arithmetic number, because the mean of its divisors is an integer number (74060370).

Almost surely, 2^281429387 is an apocalyptic number.

281429387 is a deficient number, since it is larger than the sum of its proper divisors (14812093).

281429387 is a wasteful number, since it uses less digits than its factorization.

281429387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14812092.

The product of its digits is 193536, while the sum is 44.

The square root of 281429387 is about 16775.8572657256. The cubic root of 281429387 is about 655.3246158173.

The spelling of 281429387 in words is "two hundred eighty-one million, four hundred twenty-nine thousand, three hundred eighty-seven".