427283729 has 4 divisors (see below), whose sum is σ = 452418084. Its totient is φ = 402149376.

The previous prime is 427283713. The next prime is 427283743. The reversal of 427283729 is 927382724.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 179158225 + 248125504 = 13385^2 + 15752^2 .

It is a cyclic number.

It is not a de Polignac number, because 427283729 - 2⁴ = 427283713 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 427283729.

It is not an unprimeable number, because it can be changed into a prime (427283789) 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, 12567152 + ... + 12567185.

It is an arithmetic number, because the mean of its divisors is an integer number (113104521).

Almost surely, 2^427283729 is an apocalyptic number.

It is an amenable number.

427283729 is a deficient number, since it is larger than the sum of its proper divisors (25134355).

427283729 is a wasteful number, since it uses less digits than its factorization.

427283729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25134354.

The product of its digits is 338688, while the sum is 44.

The square root of 427283729 is about 20670.8424840402. The cubic root of 427283729 is about 753.1915719669.

The spelling of 427283729 in words is "four hundred twenty-seven million, two hundred eighty-three thousand, seven hundred twenty-nine".