140820737 has 4 divisors (see below), whose sum is σ = 140857860. Its totient is φ = 140783616.

The previous prime is 140820727. The next prime is 140820751. The reversal of 140820737 is 737028041.

It is a happy number.

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 115004176 + 25816561 = 10724^2 + 5081^2 .

It is a cyclic number.

It is not a de Polignac number, because 140820737 - 2⁴ = 140820721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140820727) 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, 12128 + ... + 20705.

It is an arithmetic number, because the mean of its divisors is an integer number (35214465).

Almost surely, 2^140820737 is an apocalyptic number.

It is an amenable number.

140820737 is a deficient number, since it is larger than the sum of its proper divisors (37123).

140820737 is an equidigital number, since it uses as much as digits as its factorization.

140820737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37122.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 140820737 is about 11866.7913523412. The cubic root of 140820737 is about 520.2621176050.

Adding to 140820737 its reverse (737028041), we get a palindrome (877848778).

The spelling of 140820737 in words is "one hundred forty million, eight hundred twenty thousand, seven hundred thirty-seven".