140423537 has 4 divisors (see below), whose sum is σ = 140448996. Its totient is φ = 140398080.

The previous prime is 140423513. The next prime is 140423551. The reversal of 140423537 is 735324041.

It is a happy number.

140423537 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 24990001 + 115433536 = 4999^2 + 10744^2 .

It is a cyclic number.

It is not a de Polignac number, because 140423537 - 2¹² = 140419441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140423557) 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, 608 + ... + 16769.

It is an arithmetic number, because the mean of its divisors is an integer number (35112249).

Almost surely, 2^140423537 is an apocalyptic number.

It is an amenable number.

140423537 is a deficient number, since it is larger than the sum of its proper divisors (25459).

140423537 is an equidigital number, since it uses as much as digits as its factorization.

140423537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25458.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 140423537 is about 11850.0437551935. The cubic root of 140423537 is about 519.7725052709.

Adding to 140423537 its reverse (735324041), we get a palindrome (875747578).

The spelling of 140423537 in words is "one hundred forty million, four hundred twenty-three thousand, five hundred thirty-seven".