197980869 has 4 divisors (see below), whose sum is σ = 263974496. Its totient is φ = 131987244.

The previous prime is 197980843. The next prime is 197980879. The reversal of 197980869 is 968089791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 968089791 = 3 ⋅322696597.

It is not a de Polignac number, because 197980869 - 2⁵ = 197980837 is a prime.

It is a super-2 number, since 2×197980869² = 78392848979990322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197980829) 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, 32996809 + ... + 32996814.

It is an arithmetic number, because the mean of its divisors is an integer number (65993624).

Almost surely, 2^197980869 is an apocalyptic number.

It is an amenable number.

197980869 is a deficient number, since it is larger than the sum of its proper divisors (65993627).

197980869 is an equidigital number, since it uses as much as digits as its factorization.

197980869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65993626.

The product of its (nonzero) digits is 1959552, while the sum is 57.

The square root of 197980869 is about 14070.5674725649. The cubic root of 197980869 is about 582.8288959045.

The spelling of 197980869 in words is "one hundred ninety-seven million, nine hundred eighty thousand, eight hundred sixty-nine".