973128407 has 2 divisors, whose sum is σ = 973128408. Its totient is φ = 973128406.

The previous prime is 973128371. The next prime is 973128421. The reversal of 973128407 is 704821379.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 973128407 - 2¹⁰ = 973127383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (973128427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 486564203 + 486564204.

It is an arithmetic number, because the mean of its divisors is an integer number (486564204).

Almost surely, 2^973128407 is an apocalyptic number.

973128407 is a deficient number, since it is larger than the sum of its proper divisors (1).

973128407 is an equidigital number, since it uses as much as digits as its factorization.

973128407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 973128407 is about 31195.0061227755. The cubic root of 973128407 is about 990.9613513071.

The spelling of 973128407 in words is "nine hundred seventy-three million, one hundred twenty-eight thousand, four hundred seven".