140990405 has 4 divisors (see below), whose sum is σ = 169188492. Its totient is φ = 112792320.

The previous prime is 140990383. The next prime is 140990413. The reversal of 140990405 is 504099041.

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 43652449 + 97337956 = 6607^2 + 9866^2 .

It is not a de Polignac number, because 140990405 - 2⁸ = 140990149 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, 14099036 + ... + 14099045.

It is an arithmetic number, because the mean of its divisors is an integer number (42297123).

Almost surely, 2^140990405 is an apocalyptic number.

It is an amenable number.

140990405 is a deficient number, since it is larger than the sum of its proper divisors (28198087).

140990405 is an equidigital number, since it uses as much as digits as its factorization.

140990405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28198086.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 140990405 is about 11873.9380577802. The cubic root of 140990405 is about 520.4709798486.

The spelling of 140990405 in words is "one hundred forty million, nine hundred ninety thousand, four hundred five".