140346781 has 12 divisors (see below), whose sum is σ = 151633440. Its totient is φ = 129836480.

The previous prime is 140346779. The next prime is 140346793. The reversal of 140346781 is 187643041.

It is a happy number.

140346781 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 140346781 - 2¹ = 140346779 is a prime.

It is a super-2 number, since 2×140346781² = 39394437874123922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140346751) 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, 12936 + ... + 21166.

It is an arithmetic number, because the mean of its divisors is an integer number (12636120).

Almost surely, 2^140346781 is an apocalyptic number.

It is an amenable number.

140346781 is a deficient number, since it is larger than the sum of its proper divisors (11286659).

140346781 is an equidigital number, since it uses as much as digits as its factorization.

140346781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8324 (or 8307 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 140346781 is about 11846.8046746792. The cubic root of 140346781 is about 519.6777848498.

It can be divided in two parts, 1403 and 46781, that added together give a palindrome (48184).

The spelling of 140346781 in words is "one hundred forty million, three hundred forty-six thousand, seven hundred eighty-one".