140790905 has 4 divisors (see below), whose sum is σ = 168949092. Its totient is φ = 112632720.

The previous prime is 140790887. The next prime is 140790907. The reversal of 140790905 is 509097041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 509097041 = 41 ⋅12417001.

It can be written as a sum of positive squares in 2 ways, for example, as 54449641 + 86341264 = 7379^2 + 9292^2 .

It is not a de Polignac number, because 140790905 - 2⁶ = 140790841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140790907) 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, 14079086 + ... + 14079095.

It is an arithmetic number, because the mean of its divisors is an integer number (42237273).

Almost surely, 2^140790905 is an apocalyptic number.

It is an amenable number.

140790905 is a deficient number, since it is larger than the sum of its proper divisors (28158187).

140790905 is an equidigital number, since it uses as much as digits as its factorization.

140790905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28158186.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 140790905 is about 11865.5343326797. The cubic root of 140790905 is about 520.2253769092.

The spelling of 140790905 in words is "one hundred forty million, seven hundred ninety thousand, nine hundred five".