140899405 has 4 divisors (see below), whose sum is σ = 169079292. Its totient is φ = 112719520.

The previous prime is 140899391. The next prime is 140899439. The reversal of 140899405 is 504998041.

140899405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 504998041 = 1049 ⋅481409.

It can be written as a sum of positive squares in 2 ways, for example, as 52577001 + 88322404 = 7251^2 + 9398^2 .

It is not a de Polignac number, because 140899405 - 2⁹ = 140898893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14089936 + ... + 14089945.

It is an arithmetic number, because the mean of its divisors is an integer number (42269823).

Almost surely, 2^140899405 is an apocalyptic number.

It is an amenable number.

140899405 is a deficient number, since it is larger than the sum of its proper divisors (28179887).

140899405 is an equidigital number, since it uses as much as digits as its factorization.

140899405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28179886.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 140899405 is about 11870.1055176439. The cubic root of 140899405 is about 520.3589791946.

The spelling of 140899405 in words is "one hundred forty million, eight hundred ninety-nine thousand, four hundred five".