140636945 has 8 divisors (see below), whose sum is σ = 170435880. Its totient is φ = 111395200.

The previous prime is 140636933. The next prime is 140636959. The reversal of 140636945 is 549636041.

It can be written as a sum of positive squares in 4 ways, for example, as 45144961 + 95491984 = 6719^2 + 9772^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 140636945 - 2¹⁰ = 140635921 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 140636899 and 140636908.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138740 + ... + 139749.

It is an arithmetic number, because the mean of its divisors is an integer number (21304485).

Almost surely, 2^140636945 is an apocalyptic number.

It is an amenable number.

140636945 is a deficient number, since it is larger than the sum of its proper divisors (29798935).

140636945 is a wasteful number, since it uses less digits than its factorization.

140636945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278595.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 140636945 is about 11859.0448603587. The cubic root of 140636945 is about 520.0356792580.

The spelling of 140636945 in words is "one hundred forty million, six hundred thirty-six thousand, nine hundred forty-five".