197770381 has 8 divisors (see below), whose sum is σ = 199295424. Its totient is φ = 196250880.

The previous prime is 197770361. The next prime is 197770457. The reversal of 197770381 is 183077791.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 197770381 - 2⁷ = 197770253 is a prime.

It is a super-2 number, since 2×197770381² = 78226247201770322, 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 (197770361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93720 + ... + 95806.

It is an arithmetic number, because the mean of its divisors is an integer number (24911928).

Almost surely, 2^197770381 is an apocalyptic number.

It is an amenable number.

197770381 is a deficient number, since it is larger than the sum of its proper divisors (1525043).

197770381 is a wasteful number, since it uses less digits than its factorization.

197770381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771.

The product of its (nonzero) digits is 74088, while the sum is 43.

The square root of 197770381 is about 14063.0857566894. The cubic root of 197770381 is about 582.6222732627.

The spelling of 197770381 in words is "one hundred ninety-seven million, seven hundred seventy thousand, three hundred eighty-one".