140634643 has 2 divisors, whose sum is σ = 140634644. Its totient is φ = 140634642.

The previous prime is 140634623. The next prime is 140634649. The reversal of 140634643 is 346436041.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 140634643 - 2²¹ = 138537491 is a prime.

It is not a weakly prime, because it can be changed into another prime (140634649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70317321 + 70317322.

It is an arithmetic number, because the mean of its divisors is an integer number (70317322).

Almost surely, 2^140634643 is an apocalyptic number.

140634643 is a deficient number, since it is larger than the sum of its proper divisors (1).

140634643 is an equidigital number, since it uses as much as digits as its factorization.

140634643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 140634643 is about 11858.9478032412. The cubic root of 140634643 is about 520.0328418607.

The spelling of 140634643 in words is "one hundred forty million, six hundred thirty-four thousand, six hundred forty-three".