140813817 has 4 divisors (see below), whose sum is σ = 187751760. Its totient is φ = 93875876.

The previous prime is 140813789. The next prime is 140813851. The reversal of 140813817 is 718318041.

140813817 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 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 140813817 - 2¹⁵ = 140781049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (140813857) 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, 23468967 + ... + 23468972.

It is an arithmetic number, because the mean of its divisors is an integer number (46937940).

Almost surely, 2^140813817 is an apocalyptic number.

It is an amenable number.

140813817 is a deficient number, since it is larger than the sum of its proper divisors (46937943).

140813817 is an equidigital number, since it uses as much as digits as its factorization.

140813817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46937942.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 140813817 is about 11866.4997787890. The cubic root of 140813817 is about 520.2535954870.

It can be divided in two parts, 1408 and 13817, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 140813817 in words is "one hundred forty million, eight hundred thirteen thousand, eight hundred seventeen".