140218897 has 8 divisors (see below), whose sum is σ = 172577216. Its totient is φ = 110942352.

The previous prime is 140218889. The next prime is 140218901. The reversal of 140218897 is 798812041.

It is a happy number.

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 140218897 - 2³ = 140218889 is a prime.

It is a super-2 number, since 2×140218897² = 39322678151793218, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140218847) 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 7 ways as a sum of consecutive naturals, for example, 770343 + ... + 770524.

It is an arithmetic number, because the mean of its divisors is an integer number (21572152).

Almost surely, 2^140218897 is an apocalyptic number.

It is an amenable number.

140218897 is a deficient number, since it is larger than the sum of its proper divisors (32358319).

140218897 is a wasteful number, since it uses less digits than its factorization.

140218897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540887.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 140218897 is about 11841.4060398248. The cubic root of 140218897 is about 519.5198934011.

The spelling of 140218897 in words is "one hundred forty million, two hundred eighteen thousand, eight hundred ninety-seven".