140440297 has 2 divisors, whose sum is σ = 140440298. Its totient is φ = 140440296.

The previous prime is 140440259. The next prime is 140440331. The reversal of 140440297 is 792044041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 127328656 + 13111641 = 11284^2 + 3621^2 .

It is a cyclic number.

It is not a de Polignac number, because 140440297 - 2⁷ = 140440169 is a prime.

It is not a weakly prime, because it can be changed into another prime (140440217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70220148 + 70220149.

It is an arithmetic number, because the mean of its divisors is an integer number (70220149).

Almost surely, 2^140440297 is an apocalyptic number.

It is an amenable number.

140440297 is a deficient number, since it is larger than the sum of its proper divisors (1).

140440297 is an equidigital number, since it uses as much as digits as its factorization.

140440297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 140440297 is about 11850.7509044786. The cubic root of 140440297 is about 519.7931832874.

The spelling of 140440297 in words is "one hundred forty million, four hundred forty thousand, two hundred ninety-seven".