214742729 has 4 divisors (see below), whose sum is σ = 215507220. Its totient is φ = 213978240.

The previous prime is 214742711. The next prime is 214742741. The reversal of 214742729 is 927247412.

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 134676025 + 80066704 = 11605^2 + 8948^2 .

It is a cyclic number.

It is not a de Polignac number, because 214742729 - 2²⁰ = 213694153 is a prime.

It is a super-2 number, since 2×214742729² = 92228879316734882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 214742692 and 214742701.

It is not an unprimeable number, because it can be changed into a prime (214742779) 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, 381824 + ... + 382385.

It is an arithmetic number, because the mean of its divisors is an integer number (53876805).

Almost surely, 2^214742729 is an apocalyptic number.

It is an amenable number.

214742729 is a deficient number, since it is larger than the sum of its proper divisors (764491).

214742729 is an equidigital number, since it uses as much as digits as its factorization.

214742729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 764490.

The product of its digits is 56448, while the sum is 38.

The square root of 214742729 is about 14654.1028043344. The cubic root of 214742729 is about 598.8335941502.

The spelling of 214742729 in words is "two hundred fourteen million, seven hundred forty-two thousand, seven hundred twenty-nine".