706331531 has 2 divisors, whose sum is σ = 706331532. Its totient is φ = 706331530.

The previous prime is 706331519. The next prime is 706331533. The reversal of 706331531 is 135133607.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 706331531 - 2¹⁴ = 706315147 is a prime.

It is a super-2 number, since 2×706331531² = 997808463369607922, which contains 22 as substring.

Together with 706331533, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 706331494 and 706331503.

It is not a weakly prime, because it can be changed into another prime (706331533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 353165765 + 353165766.

It is an arithmetic number, because the mean of its divisors is an integer number (353165766).

Almost surely, 2^706331531 is an apocalyptic number.

706331531 is a deficient number, since it is larger than the sum of its proper divisors (1).

706331531 is an equidigital number, since it uses as much as digits as its factorization.

706331531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5670, while the sum is 29.

The square root of 706331531 is about 26576.8984458307. The cubic root of 706331531 is about 890.5730144045.

The spelling of 706331531 in words is "seven hundred six million, three hundred thirty-one thousand, five hundred thirty-one".