140634401 has 2 divisors, whose sum is σ = 140634402. Its totient is φ = 140634400.

The previous prime is 140634391. The next prime is 140634479. The reversal of 140634401 is 104436041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 134003776 + 6630625 = 11576^2 + 2575^2 .

It is a cyclic number.

It is not a de Polignac number, because 140634401 - 2¹⁴ = 140618017 is a prime.

It is not a weakly prime, because it can be changed into another prime (140630401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70317200 + 70317201.

It is an arithmetic number, because the mean of its divisors is an integer number (70317201).

Almost surely, 2^140634401 is an apocalyptic number.

It is an amenable number.

140634401 is a deficient number, since it is larger than the sum of its proper divisors (1).

140634401 is an equidigital number, since it uses as much as digits as its factorization.

140634401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 140634401 is about 11858.9375999707. The cubic root of 140634401 is about 520.0325435747.

The spelling of 140634401 in words is "one hundred forty million, six hundred thirty-four thousand, four hundred one".