197149381 has 16 divisors (see below), whose sum is σ = 232360128. Its totient is φ = 164908800.

The previous prime is 197149369. The next prime is 197149387. The reversal of 197149381 is 183941791.

It is a cyclic number.

It is not a de Polignac number, because 197149381 - 2¹⁷ = 197018309 is a prime.

It is a super-2 number, since 2×197149381² = 77735756857366322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197149387) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 46146 + ... + 50236.

It is an arithmetic number, because the mean of its divisors is an integer number (14522508).

Almost surely, 2^197149381 is an apocalyptic number.

197149381 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

197149381 is a deficient number, since it is larger than the sum of its proper divisors (35210747).

197149381 is a wasteful number, since it uses less digits than its factorization.

197149381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4452.

The product of its digits is 54432, while the sum is 43.

The square root of 197149381 is about 14040.9893169961. The cubic root of 197149381 is about 582.0118215774.

The spelling of 197149381 in words is "one hundred ninety-seven million, one hundred forty-nine thousand, three hundred eighty-one".