712420217 has 4 divisors (see below), whose sum is σ = 713280420. Its totient is φ = 711560016.

The previous prime is 712420187. The next prime is 712420243. The reversal of 712420217 is 712024217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 712024217 = 3559 ⋅200063.

It can be written as a sum of positive squares in 2 ways, for example, as 126247696 + 586172521 = 11236^2 + 24211^2 .

It is a cyclic number.

It is not a de Polignac number, because 712420217 - 2⁶ = 712420153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (712420277) 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, 428858 + ... + 430515.

It is an arithmetic number, because the mean of its divisors is an integer number (178320105).

Almost surely, 2^712420217 is an apocalyptic number.

It is an amenable number.

712420217 is a deficient number, since it is larger than the sum of its proper divisors (860203).

712420217 is an equidigital number, since it uses as much as digits as its factorization.

712420217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860202.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 712420217 is about 26691.2011157235. The cubic root of 712420217 is about 893.1246551480.

The spelling of 712420217 in words is "seven hundred twelve million, four hundred twenty thousand, two hundred seventeen".