671428961293 has 2 divisors, whose sum is σ = 671428961294. Its totient is φ = 671428961292.

The previous prime is 671428961263. The next prime is 671428961299. The reversal of 671428961293 is 392169824176.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 613923962089 + 57504999204 = 783533^2 + 239802^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-671428961293 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (671428961299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335714480646 + 335714480647.

It is an arithmetic number, because the mean of its divisors is an integer number (335714480647).

Almost surely, 2^671428961293 is an apocalyptic number.

It is an amenable number.

671428961293 is a deficient number, since it is larger than the sum of its proper divisors (1).

671428961293 is an equidigital number, since it uses as much as digits as its factorization.

671428961293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 58.

The spelling of 671428961293 in words is "six hundred seventy-one billion, four hundred twenty-eight million, nine hundred sixty-one thousand, two hundred ninety-three".