140247473 has 4 divisors (see below), whose sum is σ = 140284020. Its totient is φ = 140210928.

The previous prime is 140247463. The next prime is 140247521. The reversal of 140247473 is 374742041.

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

It can be written as a sum of positive squares in 2 ways, for example, as 106977649 + 33269824 = 10343^2 + 5768^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-140247473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140247403) 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, 11738 + ... + 20451.

It is an arithmetic number, because the mean of its divisors is an integer number (35071005).

Almost surely, 2^140247473 is an apocalyptic number.

It is an amenable number.

140247473 is a deficient number, since it is larger than the sum of its proper divisors (36547).

140247473 is an equidigital number, since it uses as much as digits as its factorization.

140247473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36546.

The product of its (nonzero) digits is 18816, while the sum is 32.

The square root of 140247473 is about 11842.6125918228. The cubic root of 140247473 is about 519.5551829672. Note that the first 3 decimals are identical.

The spelling of 140247473 in words is "one hundred forty million, two hundred forty-seven thousand, four hundred seventy-three".