140398811 has 4 divisors (see below), whose sum is σ = 160455792. Its totient is φ = 120341832.

The previous prime is 140398807. The next prime is 140398859. The reversal of 140398811 is 118893041.

140398811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118893041 = 67 ⋅1774523.

It is a cyclic number.

It is not a de Polignac number, because 140398811 - 2² = 140398807 is a prime.

It is a super-2 number, since 2×140398811² = 39423652260427442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140398211) 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, 10028480 + ... + 10028493.

It is an arithmetic number, because the mean of its divisors is an integer number (40113948).

Almost surely, 2^140398811 is an apocalyptic number.

140398811 is a deficient number, since it is larger than the sum of its proper divisors (20056981).

140398811 is an equidigital number, since it uses as much as digits as its factorization.

140398811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20056980.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 140398811 is about 11849.0004219765. Note that the first 3 decimals coincide. The cubic root of 140398811 is about 519.7419960233.

The spelling of 140398811 in words is "one hundred forty million, three hundred ninety-eight thousand, eight hundred eleven".