1973305316623 has 2 divisors, whose sum is σ = 1973305316624. Its totient is φ = 1973305316622.

The previous prime is 1973305316579. The next prime is 1973305316677. The reversal of 1973305316623 is 3266135033791.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1973305316623 - 2³³ = 1964715382031 is a prime.

It is a super-2 number, since 2×1973305316623² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973305316023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986652658311 + 986652658312.

It is an arithmetic number, because the mean of its divisors is an integer number (986652658312).

Almost surely, 2^{1973305316623} is an apocalyptic number.

1973305316623 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973305316623 is an equidigital number, since it uses as much as digits as its factorization.

1973305316623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1837080, while the sum is 49.

The spelling of 1973305316623 in words is "one trillion, nine hundred seventy-three billion, three hundred five million, three hundred sixteen thousand, six hundred twenty-three".