971806673 has 2 divisors, whose sum is σ = 971806674. Its totient is φ = 971806672.

The previous prime is 971806657. The next prime is 971806681. The reversal of 971806673 is 376608179.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 773785489 + 198021184 = 27817^2 + 14072^2 .

It is a cyclic number.

It is not a de Polignac number, because 971806673 - 2⁴ = 971806657 is a prime.

It is not a weakly prime, because it can be changed into another prime (971806643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485903336 + 485903337.

It is an arithmetic number, because the mean of its divisors is an integer number (485903337).

Almost surely, 2^971806673 is an apocalyptic number.

It is an amenable number.

971806673 is a deficient number, since it is larger than the sum of its proper divisors (1).

971806673 is an equidigital number, since it uses as much as digits as its factorization.

971806673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 381024, while the sum is 47.

The square root of 971806673 is about 31173.8138988479. The cubic root of 971806673 is about 990.5124962717.

It can be divided in two parts, 97 and 1806673, that multiplied together give a triangular number (175247281 = T₁₈₇₂₁).

The spelling of 971806673 in words is "nine hundred seventy-one million, eight hundred six thousand, six hundred seventy-three".