140291407 has 4 divisors (see below), whose sum is σ = 140470456. Its totient is φ = 140112360.

The previous prime is 140291401. The next prime is 140291419. The reversal of 140291407 is 704192041.

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 140291407 - 2⁷ = 140291279 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 (140291401) 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, 88344 + ... + 89917.

It is an arithmetic number, because the mean of its divisors is an integer number (35117614).

Almost surely, 2^140291407 is an apocalyptic number.

140291407 is a deficient number, since it is larger than the sum of its proper divisors (179049).

140291407 is an equidigital number, since it uses as much as digits as its factorization.

140291407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179048.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 140291407 is about 11844.4673582226. The cubic root of 140291407 is about 519.6094293500.

The spelling of 140291407 in words is "one hundred forty million, two hundred ninety-one thousand, four hundred seven".