197783820701 has 2 divisors, whose sum is σ = 197783820702. Its totient is φ = 197783820700.

The previous prime is 197783820643. The next prime is 197783820733. The reversal of 197783820701 is 107028387791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197638039225 + 145781476 = 444565^2 + 12074^2 .

It is a cyclic number.

It is not a de Polignac number, because 197783820701 - 2²² = 197779626397 is a prime.

It is a super-2 number, since 2×197783820701² (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 (197783826701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98891910350 + 98891910351.

It is an arithmetic number, because the mean of its divisors is an integer number (98891910351).

Almost surely, 2^197783820701 is an apocalyptic number.

It is an amenable number.

197783820701 is a deficient number, since it is larger than the sum of its proper divisors (1).

197783820701 is an equidigital number, since it uses as much as digits as its factorization.

197783820701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1185408, while the sum is 53.

The spelling of 197783820701 in words is "one hundred ninety-seven billion, seven hundred eighty-three million, eight hundred twenty thousand, seven hundred one".