140281613 has 4 divisors (see below), whose sum is σ = 145118940. Its totient is φ = 135444288.

The previous prime is 140281591. The next prime is 140281621. The reversal of 140281613 is 316182041.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 71690089 + 68591524 = 8467^2 + 8282^2 .

It is a cyclic number.

It is not a de Polignac number, because 140281613 - 2²⁴ = 123504397 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 (140281633) 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, 2418620 + ... + 2418677.

It is an arithmetic number, because the mean of its divisors is an integer number (36279735).

Almost surely, 2^140281613 is an apocalyptic number.

It is an amenable number.

140281613 is a deficient number, since it is larger than the sum of its proper divisors (4837327).

140281613 is an equidigital number, since it uses as much as digits as its factorization.

140281613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4837326.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 140281613 is about 11844.0539090296. The cubic root of 140281613 is about 519.5973374400.

The spelling of 140281613 in words is "one hundred forty million, two hundred eighty-one thousand, six hundred thirteen".