140406913 has 4 divisors (see below), whose sum is σ = 140440000. Its totient is φ = 140373828.

The previous prime is 140406887. The next prime is 140406953. The reversal of 140406913 is 319604041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 319604041 = 29 ⋅11020829.

It is a cyclic number.

It is not a de Polignac number, because 140406913 - 2⁹ = 140406401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140406953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9045 + ... + 19042.

It is an arithmetic number, because the mean of its divisors is an integer number (35110000).

Almost surely, 2^140406913 is an apocalyptic number.

It is an amenable number.

140406913 is a deficient number, since it is larger than the sum of its proper divisors (33087).

140406913 is an equidigital number, since it uses as much as digits as its factorization.

140406913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33086.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 140406913 is about 11849.3423024234. The cubic root of 140406913 is about 519.7519934220.

The spelling of 140406913 in words is "one hundred forty million, four hundred six thousand, nine hundred thirteen".