140972731 has 4 divisors (see below), whose sum is σ = 141019272. Its totient is φ = 140926192.

The previous prime is 140972651. The next prime is 140972737. The reversal of 140972731 is 137279041.

140972731 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.

It is a cyclic number.

It is not a de Polignac number, because 140972731 - 2¹⁵ = 140939963 is a prime.

It is a super-2 number, since 2×140972731² = 39746621771196722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140972737) 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, 18385 + ... + 24898.

It is an arithmetic number, because the mean of its divisors is an integer number (35254818).

Almost surely, 2^140972731 is an apocalyptic number.

140972731 is a deficient number, since it is larger than the sum of its proper divisors (46541).

140972731 is an equidigital number, since it uses as much as digits as its factorization.

140972731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46540.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 140972731 is about 11873.1937994796. The cubic root of 140972731 is about 520.4492308780.

The spelling of 140972731 in words is "one hundred forty million, nine hundred seventy-two thousand, seven hundred thirty-one".