1973517853 has 2 divisors, whose sum is σ = 1973517854. Its totient is φ = 1973517852.

The previous prime is 1973517823. The next prime is 1973517857. The reversal of 1973517853 is 3587153791.

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., 1964439684 + 9078169 = 44322^2 + 3013^2 .

It is a cyclic number.

It is not a de Polignac number, because 1973517853 - 2¹³ = 1973509661 is a prime.

It is a super-2 number, since 2×1973517853² = 7789545432219459218, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1973517797 and 1973517806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973517857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986758926 + 986758927.

It is an arithmetic number, because the mean of its divisors is an integer number (986758927).

Almost surely, 2^1973517853 is an apocalyptic number.

It is an amenable number.

1973517853 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973517853 is an equidigital number, since it uses as much as digits as its factorization.

1973517853 is an evil number, because the sum of its binary digits is even.

The product of its digits is 793800, while the sum is 49.

The square root of 1973517853 is about 44424.2935002910. The cubic root of 1973517853 is about 1254.3354212208.

The spelling of 1973517853 in words is "one billion, nine hundred seventy-three million, five hundred seventeen thousand, eight hundred fifty-three".