140613681 has 32 divisors (see below), whose sum is σ = 216276480. Its totient is φ = 80492544.

The previous prime is 140613679. The next prime is 140613689. The reversal of 140613681 is 186316041.

It is not a de Polignac number, because 140613681 - 2¹ = 140613679 is a prime.

It is a super-2 number, since 2×140613681² = 39544414568739522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (140613689) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 57816 + ... + 60198.

It is an arithmetic number, because the mean of its divisors is an integer number (6758640).

Almost surely, 2^140613681 is an apocalyptic number.

It is an amenable number.

140613681 is a deficient number, since it is larger than the sum of its proper divisors (75662799).

140613681 is a wasteful number, since it uses less digits than its factorization.

140613681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2505.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 140613681 is about 11858.0639650830. The cubic root of 140613681 is about 520.0070031108.

The spelling of 140613681 in words is "one hundred forty million, six hundred thirteen thousand, six hundred eighty-one".