706902421 has 2 divisors, whose sum is σ = 706902422. Its totient is φ = 706902420.

The previous prime is 706902409. The next prime is 706902433. The reversal of 706902421 is 124209607.

It is a balanced prime because it is at equal distance from previous prime (706902409) and next prime (706902433).

It can be written as a sum of positive squares in only one way, i.e., 706815396 + 87025 = 26586^2 + 295^2 .

It is an emirp because it is prime and its reverse (124209607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 706902421 - 2¹³ = 706894229 is a prime.

It is a super-2 number, since 2×706902421² = 999422065631322482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (706902491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353451210 + 353451211.

It is an arithmetic number, because the mean of its divisors is an integer number (353451211).

Almost surely, 2^706902421 is an apocalyptic number.

It is an amenable number.

706902421 is a deficient number, since it is larger than the sum of its proper divisors (1).

706902421 is an equidigital number, since it uses as much as digits as its factorization.

706902421 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 31.

The square root of 706902421 is about 26587.6366193011. The cubic root of 706902421 is about 890.8128839706.

The spelling of 706902421 in words is "seven hundred six million, nine hundred two thousand, four hundred twenty-one".