197620499 has 2 divisors, whose sum is σ = 197620500. Its totient is φ = 197620498.

The previous prime is 197620487. The next prime is 197620519. The reversal of 197620499 is 994026791.

It is a weak prime.

It is an emirp because it is prime and its reverse (994026791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197620499 - 2⁴ = 197620483 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (197620429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98810249 + 98810250.

It is an arithmetic number, because the mean of its divisors is an integer number (98810250).

Almost surely, 2^197620499 is an apocalyptic number.

197620499 is a deficient number, since it is larger than the sum of its proper divisors (1).

197620499 is an equidigital number, since it uses as much as digits as its factorization.

197620499 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 244944, while the sum is 47.

The square root of 197620499 is about 14057.7558308572. The cubic root of 197620499 is about 582.4750542836.

The spelling of 197620499 in words is "one hundred ninety-seven million, six hundred twenty thousand, four hundred ninety-nine".