197678090 has 16 divisors (see below), whose sum is σ = 374548320. Its totient is φ = 74909520.

The previous prime is 197678059. The next prime is 197678101. The reversal of 197678090 is 90876791.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 520016 + ... + 520395.

It is an arithmetic number, because the mean of its divisors is an integer number (23409270).

Almost surely, 2^197678090 is an apocalyptic number.

197678090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

197678090 is a deficient number, since it is larger than the sum of its proper divisors (176870230).

197678090 is a wasteful number, since it uses less digits than its factorization.

197678090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1040437.

The product of its (nonzero) digits is 190512, while the sum is 47.

The square root of 197678090 is about 14059.8040526886. The cubic root of 197678090 is about 582.5316308414.

The spelling of 197678090 in words is "one hundred ninety-seven million, six hundred seventy-eight thousand, ninety".