7971630493 has 2 divisors, whose sum is σ = 7971630494. Its totient is φ = 7971630492.

The previous prime is 7971630431. The next prime is 7971630523. The reversal of 7971630493 is 3940361797.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7157498404 + 814132089 = 84602^2 + 28533^2 .

It is a cyclic number.

It is not a de Polignac number, because 7971630493 - 2¹⁷ = 7971499421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7971630593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3985815246 + 3985815247.

It is an arithmetic number, because the mean of its divisors is an integer number (3985815247).

Almost surely, 2^7971630493 is an apocalyptic number.

It is an amenable number.

7971630493 is a deficient number, since it is larger than the sum of its proper divisors (1).

7971630493 is an equidigital number, since it uses as much as digits as its factorization.

7971630493 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 857304, while the sum is 49.

The square root of 7971630493 is about 89283.9878869666. The cubic root of 7971630493 is about 1997.6330743532.

The spelling of 7971630493 in words is "seven billion, nine hundred seventy-one million, six hundred thirty thousand, four hundred ninety-three".