872417722993 has 2 divisors, whose sum is σ = 872417722994. Its totient is φ = 872417722992.

The previous prime is 872417722951. The next prime is 872417723017. The reversal of 872417722993 is 399227714278.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 650042287504 + 222375435489 = 806252^2 + 471567^2 .

It is a cyclic number.

It is not a de Polignac number, because 872417722993 - 2¹³ = 872417714801 is a prime.

It is a super-2 number, since 2×872417722993² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (872417722933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436208861496 + 436208861497.

It is an arithmetic number, because the mean of its divisors is an integer number (436208861497).

Almost surely, 2^872417722993 is an apocalyptic number.

It is an amenable number.

872417722993 is a deficient number, since it is larger than the sum of its proper divisors (1).

872417722993 is an equidigital number, since it uses as much as digits as its factorization.

872417722993 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21337344, while the sum is 61.

The spelling of 872417722993 in words is "eight hundred seventy-two billion, four hundred seventeen million, seven hundred twenty-two thousand, nine hundred ninety-three".