140354989 has 2 divisors, whose sum is σ = 140354990. Its totient is φ = 140354988.

The previous prime is 140354987. The next prime is 140355029. The reversal of 140354989 is 989453041.

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., 110565225 + 29789764 = 10515^2 + 5458^2 .

It is a cyclic number.

It is not a de Polignac number, because 140354989 - 2¹ = 140354987 is a prime.

Together with 140354987, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140354987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70177494 + 70177495.

It is an arithmetic number, because the mean of its divisors is an integer number (70177495).

Almost surely, 2^140354989 is an apocalyptic number.

It is an amenable number.

140354989 is a deficient number, since it is larger than the sum of its proper divisors (1).

140354989 is an equidigital number, since it uses as much as digits as its factorization.

140354989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 140354989 is about 11847.1510921403. The cubic root of 140354989 is about 519.6879155468.

The spelling of 140354989 in words is "one hundred forty million, three hundred fifty-four thousand, nine hundred eighty-nine".