197460978901 has 2 divisors, whose sum is σ = 197460978902. Its totient is φ = 197460978900.

The previous prime is 197460978899. The next prime is 197460978929. The reversal of 197460978901 is 109879064791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169868446801 + 27592532100 = 412151^2 + 166110^2 .

It is a cyclic number.

It is not a de Polignac number, because 197460978901 - 2¹ = 197460978899 is a prime.

Together with 197460978899, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 197460978901.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197460978931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98730489450 + 98730489451.

It is an arithmetic number, because the mean of its divisors is an integer number (98730489451).

Almost surely, 2^197460978901 is an apocalyptic number.

It is an amenable number.

197460978901 is a deficient number, since it is larger than the sum of its proper divisors (1).

197460978901 is an equidigital number, since it uses as much as digits as its factorization.

197460978901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6858432, while the sum is 61.

The spelling of 197460978901 in words is "one hundred ninety-seven billion, four hundred sixty million, nine hundred seventy-eight thousand, nine hundred one".