197078899 has 4 divisors (see below), whose sum is σ = 198288136. Its totient is φ = 195869664.

The previous prime is 197078837. The next prime is 197078911. The reversal of 197078899 is 998870791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 998870791 = 61 ⋅16374931.

It is a cyclic number.

It is not a de Polignac number, because 197078899 - 2⁷ = 197078771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197078599) 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, 604374 + ... + 604699.

It is an arithmetic number, because the mean of its divisors is an integer number (49572034).

Almost surely, 2^197078899 is an apocalyptic number.

197078899 is a deficient number, since it is larger than the sum of its proper divisors (1209237).

197078899 is a wasteful number, since it uses less digits than its factorization.

197078899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1209236.

The product of its (nonzero) digits is 2286144, while the sum is 58.

The square root of 197078899 is about 14038.4792267539. The cubic root of 197078899 is about 581.9424558230.

The spelling of 197078899 in words is "one hundred ninety-seven million, seventy-eight thousand, eight hundred ninety-nine".