197088819 has 4 divisors (see below), whose sum is σ = 262785096. Its totient is φ = 131392544.

The previous prime is 197088811. The next prime is 197088869. The reversal of 197088819 is 918880791.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 197088819 - 2³ = 197088811 is a prime.

It is a super-2 number, since 2×197088819² = 77688005149629522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (197088811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32848134 + ... + 32848139.

It is an arithmetic number, because the mean of its divisors is an integer number (65696274).

Almost surely, 2^197088819 is an apocalyptic number.

197088819 is a deficient number, since it is larger than the sum of its proper divisors (65696277).

197088819 is an equidigital number, since it uses as much as digits as its factorization.

197088819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65696276.

The product of its (nonzero) digits is 290304, while the sum is 51.

The square root of 197088819 is about 14038.8325369313. The cubic root of 197088819 is about 581.9522197168.

The spelling of 197088819 in words is "one hundred ninety-seven million, eighty-eight thousand, eight hundred nineteen".