140197997 has 8 divisors (see below), whose sum is σ = 148934016. Its totient is φ = 131516352.

The previous prime is 140197961. The next prime is 140198053. The reversal of 140197997 is 799791041.

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

It is not a de Polignac number, because 140197997 - 2⁶ = 140197933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140197957) 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, 8213 + ... + 18650.

It is an arithmetic number, because the mean of its divisors is an integer number (18616752).

Almost surely, 2^140197997 is an apocalyptic number.

140197997 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

140197997 is a deficient number, since it is larger than the sum of its proper divisors (8736019).

140197997 is a wasteful number, since it uses less digits than its factorization.

140197997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27187.

The product of its (nonzero) digits is 142884, while the sum is 47.

The square root of 140197997 is about 11840.5235103858. The cubic root of 140197997 is about 519.4940801774.

The spelling of 140197997 in words is "one hundred forty million, one hundred ninety-seven thousand, nine hundred ninety-seven".