197698805501 has 2 divisors, whose sum is σ = 197698805502. Its totient is φ = 197698805500.

The previous prime is 197698805459. The next prime is 197698805519. The reversal of 197698805501 is 105508896791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 195531996100 + 2166809401 = 442190^2 + 46549^2 .

It is a cyclic number.

It is not a de Polignac number, because 197698805501 - 2³⁴ = 180518936317 is a prime.

It is a super-2 number, since 2×197698805501² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197698805401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98849402750 + 98849402751.

It is an arithmetic number, because the mean of its divisors is an integer number (98849402751).

Almost surely, 2^197698805501 is an apocalyptic number.

It is an amenable number.

197698805501 is a deficient number, since it is larger than the sum of its proper divisors (1).

197698805501 is an equidigital number, since it uses as much as digits as its factorization.

197698805501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5443200, while the sum is 59.

The spelling of 197698805501 in words is "one hundred ninety-seven billion, six hundred ninety-eight million, eight hundred five thousand, five hundred one".