140813957 has 4 divisors (see below), whose sum is σ = 141165516. Its totient is φ = 140462400.

The previous prime is 140813947. The next prime is 140813963. The reversal of 140813957 is 759318041.

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 101888836 + 38925121 = 10094^2 + 6239^2 .

It is a cyclic number.

It is not a de Polignac number, because 140813957 - 2²² = 136619653 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 140813957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140813947) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175178 + ... + 175979.

It is an arithmetic number, because the mean of its divisors is an integer number (35291379).

Almost surely, 2^140813957 is an apocalyptic number.

It is an amenable number.

140813957 is a deficient number, since it is larger than the sum of its proper divisors (351559).

140813957 is an equidigital number, since it uses as much as digits as its factorization.

140813957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351558.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 140813957 is about 11866.5056777469. The cubic root of 140813957 is about 520.2537679025.

The spelling of 140813957 in words is "one hundred forty million, eight hundred thirteen thousand, nine hundred fifty-seven".