140671407 has 4 divisors (see below), whose sum is σ = 187561880. Its totient is φ = 93780936.

The previous prime is 140671393. The next prime is 140671409. The reversal of 140671407 is 704176041.

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

It is not a de Polignac number, because 140671407 - 2¹¹ = 140669359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140671409) 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, 23445232 + ... + 23445237.

It is an arithmetic number, because the mean of its divisors is an integer number (46890470).

Almost surely, 2^140671407 is an apocalyptic number.

140671407 is a deficient number, since it is larger than the sum of its proper divisors (46890473).

140671407 is an equidigital number, since it uses as much as digits as its factorization.

140671407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46890472.

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 140671407 is about 11860.4977551534. The cubic root of 140671407 is about 520.0781527013.

The spelling of 140671407 in words is "one hundred forty million, six hundred seventy-one thousand, four hundred seven".