670723637 has 2 divisors, whose sum is σ = 670723638. Its totient is φ = 670723636.

The previous prime is 670723621. The next prime is 670723663. The reversal of 670723637 is 736327076.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 549855601 + 120868036 = 23449^2 + 10994^2 .

It is a cyclic number.

It is not a de Polignac number, because 670723637 - 2⁴ = 670723621 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 670723594 and 670723603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (670723607) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335361818 + 335361819.

It is an arithmetic number, because the mean of its divisors is an integer number (335361819).

Almost surely, 2^670723637 is an apocalyptic number.

It is an amenable number.

670723637 is a deficient number, since it is larger than the sum of its proper divisors (1).

670723637 is an equidigital number, since it uses as much as digits as its factorization.

670723637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 222264, while the sum is 41.

The square root of 670723637 is about 25898.3327069524. The cubic root of 670723637 is about 875.3489272873.

The spelling of 670723637 in words is "six hundred seventy million, seven hundred twenty-three thousand, six hundred thirty-seven".