140734639 has 12 divisors (see below), whose sum is σ = 144693864. Its totient is φ = 136869744.

The previous prime is 140734603. The next prime is 140734661. The reversal of 140734639 is 936437041.

140734639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 140734639 - 2⁹ = 140734127 is a prime.

It is a super-2 number, since 2×140734639² = 39612477228920642, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 140734598 and 140734607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140734039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480177 + ... + 480469.

It is an arithmetic number, because the mean of its divisors is an integer number (12057822).

Almost surely, 2^140734639 is an apocalyptic number.

140734639 is a deficient number, since it is larger than the sum of its proper divisors (3959225).

140734639 is an equidigital number, since it uses as much as digits as its factorization.

140734639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534 (or 467 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 140734639 is about 11863.1631110762. The cubic root of 140734639 is about 520.1560663212.

It can be divided in two parts, 1407 and 34639, that added together give a triangular number (36046 = T₂₆₈).

The spelling of 140734639 in words is "one hundred forty million, seven hundred thirty-four thousand, six hundred thirty-nine".