140344487 has 2 divisors, whose sum is σ = 140344488. Its totient is φ = 140344486.

The previous prime is 140344483. The next prime is 140344499. The reversal of 140344487 is 784443041.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 140344487 - 2² = 140344483 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140344483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70172243 + 70172244.

It is an arithmetic number, because the mean of its divisors is an integer number (70172244).

Almost surely, 2^140344487 is an apocalyptic number.

140344487 is a deficient number, since it is larger than the sum of its proper divisors (1).

140344487 is an equidigital number, since it uses as much as digits as its factorization.

140344487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43008, while the sum is 35.

The square root of 140344487 is about 11846.7078549275. The cubic root of 140344487 is about 519.6749534173.

The spelling of 140344487 in words is "one hundred forty million, three hundred forty-four thousand, four hundred eighty-seven".