197769381 has 32 divisors (see below), whose sum is σ = 286338816. Its totient is φ = 120960000.

The previous prime is 197769379. The next prime is 197769389. The reversal of 197769381 is 183967791.

It is not a de Polignac number, because 197769381 - 2¹ = 197769379 is a prime.

It is a super-2 number, since 2×197769381² = 78225456122246322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197769389) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 469551 + ... + 469971.

It is an arithmetic number, because the mean of its divisors is an integer number (8948088).

Almost surely, 2^197769381 is an apocalyptic number.

It is an amenable number.

197769381 is a deficient number, since it is larger than the sum of its proper divisors (88569435).

197769381 is a wasteful number, since it uses less digits than its factorization.

197769381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653.

The product of its digits is 571536, while the sum is 51.

The square root of 197769381 is about 14063.0502025699. The cubic root of 197769381 is about 582.6212912767.

The spelling of 197769381 in words is "one hundred ninety-seven million, seven hundred sixty-nine thousand, three hundred eighty-one".