140509946 has 4 divisors (see below), whose sum is σ = 210764922. Its totient is φ = 70254972.

The previous prime is 140509937. The next prime is 140509969. The reversal of 140509946 is 649905041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 649905041 = 61 ⋅10654181.

It can be written as a sum of positive squares in only one way, i.e., 128572921 + 11937025 = 11339^2 + 3455^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35127485 + ... + 35127488.

Almost surely, 2^140509946 is an apocalyptic number.

140509946 is a deficient number, since it is larger than the sum of its proper divisors (70254976).

140509946 is an equidigital number, since it uses as much as digits as its factorization.

140509946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70254975.

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 140509946 is about 11853.6891303931. The cubic root of 140509946 is about 519.8790966448.

The spelling of 140509946 in words is "one hundred forty million, five hundred nine thousand, nine hundred forty-six".