140371817 has 4 divisors (see below), whose sum is σ = 140733060. Its totient is φ = 140010576.

The previous prime is 140371789. The next prime is 140371837. The reversal of 140371817 is 718173041.

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 92083216 + 48288601 = 9596^2 + 6949^2 .

It is a cyclic number.

It is not a de Polignac number, because 140371817 - 2¹⁰ = 140370793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (140371837) 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, 180038 + ... + 180815.

It is an arithmetic number, because the mean of its divisors is an integer number (35183265).

Almost surely, 2^140371817 is an apocalyptic number.

It is an amenable number.

140371817 is a deficient number, since it is larger than the sum of its proper divisors (361243).

140371817 is an equidigital number, since it uses as much as digits as its factorization.

140371817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361242.

The product of its (nonzero) digits is 4704, while the sum is 32.

The square root of 140371817 is about 11847.8612837930. The cubic root of 140371817 is about 519.7086842154.

The spelling of 140371817 in words is "one hundred forty million, three hundred seventy-one thousand, eight hundred seventeen".