712421609 has 2 divisors, whose sum is σ = 712421610. Its totient is φ = 712421608.

The previous prime is 712421599. The next prime is 712421621. The reversal of 712421609 is 906124217.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 552955225 + 159466384 = 23515^2 + 12628^2 .

It is an emirp because it is prime and its reverse (906124217) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-712421609 is a prime.

It is not a weakly prime, because it can be changed into another prime (712421639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 356210804 + 356210805.

It is an arithmetic number, because the mean of its divisors is an integer number (356210805).

Almost surely, 2^712421609 is an apocalyptic number.

It is an amenable number.

712421609 is a deficient number, since it is larger than the sum of its proper divisors (1).

712421609 is an equidigital number, since it uses as much as digits as its factorization.

712421609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 712421609 is about 26691.2271917198. The cubic root of 712421609 is about 893.1252368406.

The spelling of 712421609 in words is "seven hundred twelve million, four hundred twenty-one thousand, six hundred nine".