140805019 has 4 divisors (see below), whose sum is σ = 143113360. Its totient is φ = 138496680.

The previous prime is 140805013. The next prime is 140805023. The reversal of 140805019 is 910508041.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 140805019 - 2⁵ = 140804987 is a prime.

It is a super-2 number, since 2×140805019² = 39652106751180722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140805013) 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, 1154079 + ... + 1154200.

It is an arithmetic number, because the mean of its divisors is an integer number (35778340).

Almost surely, 2^140805019 is an apocalyptic number.

140805019 is a deficient number, since it is larger than the sum of its proper divisors (2308341).

140805019 is an equidigital number, since it uses as much as digits as its factorization.

140805019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2308340.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 140805019 is about 11866.1290655378. The cubic root of 140805019 is about 520.2427601713.

The spelling of 140805019 in words is "one hundred forty million, eight hundred five thousand, nineteen".