140247667 has 4 divisors (see below), whose sum is σ = 160283056. Its totient is φ = 120212280.

The previous prime is 140247659. The next prime is 140247677. The reversal of 140247667 is 766742041.

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 140247667 - 2³ = 140247659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140247617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10017684 + ... + 10017697.

It is an arithmetic number, because the mean of its divisors is an integer number (40070764).

Almost surely, 2^140247667 is an apocalyptic number.

140247667 is a deficient number, since it is larger than the sum of its proper divisors (20035389).

140247667 is an equidigital number, since it uses as much as digits as its factorization.

140247667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20035388.

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 140247667 is about 11842.6207825802. The cubic root of 140247667 is about 519.5554225286. Note that the first 3 decimals are identical.

The spelling of 140247667 in words is "one hundred forty million, two hundred forty-seven thousand, six hundred sixty-seven".