706416421 has 2 divisors, whose sum is σ = 706416422. Its totient is φ = 706416420.

The previous prime is 706416397. The next prime is 706416497. The reversal of 706416421 is 124614607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 470456100 + 235960321 = 21690^2 + 15361^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-706416421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (706414421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353208210 + 353208211.

It is an arithmetic number, because the mean of its divisors is an integer number (353208211).

Almost surely, 2^706416421 is an apocalyptic number.

It is an amenable number.

706416421 is a deficient number, since it is larger than the sum of its proper divisors (1).

706416421 is an equidigital number, since it uses as much as digits as its factorization.

706416421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 706416421 is about 26578.4954615569. The cubic root of 706416421 is about 890.6086906233.

The spelling of 706416421 in words is "seven hundred six million, four hundred sixteen thousand, four hundred twenty-one".