197426081 has 4 divisors (see below), whose sum is σ = 198529200. Its totient is φ = 196322964.

The previous prime is 197426059. The next prime is 197426101. The reversal of 197426081 is 180624791.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 197426081 - 2²² = 193231777 is a prime.

It is a super-2 number, since 2×197426081² = 77954114918037122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197426881) 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, 551291 + ... + 551648.

It is an arithmetic number, because the mean of its divisors is an integer number (49632300).

Almost surely, 2^197426081 is an apocalyptic number.

It is an amenable number.

197426081 is a deficient number, since it is larger than the sum of its proper divisors (1103119).

197426081 is a wasteful number, since it uses less digits than its factorization.

197426081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1103118.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 197426081 is about 14050.8391564348. The cubic root of 197426081 is about 582.2839796530.

The spelling of 197426081 in words is "one hundred ninety-seven million, four hundred twenty-six thousand, eighty-one".