197437081 has 4 divisors (see below), whose sum is σ = 198256564. Its totient is φ = 196617600.

The previous prime is 197437061. The next prime is 197437087. The reversal of 197437081 is 180734791.

197437081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180734791 = 877 ⋅206083.

It can be written as a sum of positive squares in 2 ways, for example, as 179024400 + 18412681 = 13380^2 + 4291^2 .

It is a cyclic number.

It is not a de Polignac number, because 197437081 - 2⁵ = 197437049 is a prime.

It is a super-2 number, since 2×197437081² = 77962801907601122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197437087) 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, 409380 + ... + 409861.

It is an arithmetic number, because the mean of its divisors is an integer number (49564141).

Almost surely, 2^197437081 is an apocalyptic number.

It is an amenable number.

197437081 is a deficient number, since it is larger than the sum of its proper divisors (819483).

197437081 is an equidigital number, since it uses as much as digits as its factorization.

197437081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 819482.

The product of its (nonzero) digits is 42336, while the sum is 40.

The square root of 197437081 is about 14051.2305866782. The cubic root of 197437081 is about 582.2947938351.

The spelling of 197437081 in words is "one hundred ninety-seven million, four hundred thirty-seven thousand, eighty-one".