1818196973 has 2 divisors, whose sum is σ = 1818196974. Its totient is φ = 1818196972.

The previous prime is 1818196967. The next prime is 1818196979. The reversal of 1818196973 is 3796918181.

It is a balanced prime because it is at equal distance from previous prime (1818196967) and next prime (1818196979).

It can be written as a sum of positive squares in only one way, i.e., 1250471044 + 567725929 = 35362^2 + 23827^2 .

It is a cyclic number.

It is not a de Polignac number, because 1818196973 - 2¹² = 1818192877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1818196979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909098486 + 909098487.

It is an arithmetic number, because the mean of its divisors is an integer number (909098487).

Almost surely, 2^1818196973 is an apocalyptic number.

It is an amenable number.

1818196973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1818196973 is an equidigital number, since it uses as much as digits as its factorization.

1818196973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 53.

The square root of 1818196973 is about 42640.3209767469. The cubic root of 1818196973 is about 1220.5258355401.

The spelling of 1818196973 in words is "one billion, eight hundred eighteen million, one hundred ninety-six thousand, nine hundred seventy-three".