140920489 has 2 divisors, whose sum is σ = 140920490. Its totient is φ = 140920488.

The previous prime is 140920487. The next prime is 140920547. The reversal of 140920489 is 984029041.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 138768400 + 2152089 = 11780^2 + 1467^2 .

It is a cyclic number.

It is not a de Polignac number, because 140920489 - 2¹ = 140920487 is a prime.

Together with 140920487, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (140920487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70460244 + 70460245.

It is an arithmetic number, because the mean of its divisors is an integer number (70460245).

Almost surely, 2^140920489 is an apocalyptic number.

It is an amenable number.

140920489 is a deficient number, since it is larger than the sum of its proper divisors (1).

140920489 is an equidigital number, since it uses as much as digits as its factorization.

140920489 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 37.

The square root of 140920489 is about 11870.9935978418. The cubic root of 140920489 is about 520.3849331758.

The spelling of 140920489 in words is "one hundred forty million, nine hundred twenty thousand, four hundred eighty-nine".