140193897 has 4 divisors (see below), whose sum is σ = 186925200. Its totient is φ = 93462596.

The previous prime is 140193877. The next prime is 140193919. The reversal of 140193897 is 798391041.

It is a happy number.

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 140193897 - 2⁷ = 140193769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140193847) 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, 23365647 + ... + 23365652.

It is an arithmetic number, because the mean of its divisors is an integer number (46731300).

Almost surely, 2^140193897 is an apocalyptic number.

It is an amenable number.

140193897 is a deficient number, since it is larger than the sum of its proper divisors (46731303).

140193897 is an equidigital number, since it uses as much as digits as its factorization.

140193897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46731302.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 140193897 is about 11840.3503748833. The cubic root of 140193897 is about 519.4890160383.

The spelling of 140193897 in words is "one hundred forty million, one hundred ninety-three thousand, eight hundred ninety-seven".