140931407 has 4 divisors (see below), whose sum is σ = 141085680. Its totient is φ = 140777136.

The previous prime is 140931403. The next prime is 140931421. The reversal of 140931407 is 704139041.

140931407 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 an emirpimes, since its reverse is a distinct semiprime: 704139041 = 16453 ⋅42797.

It is a cyclic number.

It is not a de Polignac number, because 140931407 - 2² = 140931403 is a prime.

It is a super-2 number, since 2×140931407² = 39723322957999298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140931407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140931403) 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, 75758 + ... + 77595.

It is an arithmetic number, because the mean of its divisors is an integer number (35271420).

Almost surely, 2^140931407 is an apocalyptic number.

140931407 is a deficient number, since it is larger than the sum of its proper divisors (154273).

140931407 is an equidigital number, since it uses as much as digits as its factorization.

140931407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154272.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 140931407 is about 11871.4534493465. The cubic root of 140931407 is about 520.3983719975.

The spelling of 140931407 in words is "one hundred forty million, nine hundred thirty-one thousand, four hundred seven".