140420663 has 4 divisors (see below), whose sum is σ = 148680720. Its totient is φ = 132160608.

The previous prime is 140420627. The next prime is 140420713. The reversal of 140420663 is 366024041.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366024041 = 43 ⋅8512187.

It is a cyclic number.

It is not a de Polignac number, because 140420663 - 2¹⁴ = 140404279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140420263) 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, 4130003 + ... + 4130036.

It is an arithmetic number, because the mean of its divisors is an integer number (37170180).

Almost surely, 2^140420663 is an apocalyptic number.

140420663 is a deficient number, since it is larger than the sum of its proper divisors (8260057).

140420663 is an equidigital number, since it uses as much as digits as its factorization.

140420663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260056.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 140420663 is about 11849.9224891980. The cubic root of 140420663 is about 519.7689592453.

The spelling of 140420663 in words is "one hundred forty million, four hundred twenty thousand, six hundred sixty-three".