140078989 has 2 divisors, whose sum is σ = 140078990. Its totient is φ = 140078988.

The previous prime is 140078971. The next prime is 140079013. The reversal of 140078989 is 989870041.

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., 136118889 + 3960100 = 11667^2 + 1990^2 .

It is an emirp because it is prime and its reverse (989870041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140078989 - 2⁵ = 140078957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140078959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70039494 + 70039495.

It is an arithmetic number, because the mean of its divisors is an integer number (70039495).

Almost surely, 2^140078989 is an apocalyptic number.

It is an amenable number.

140078989 is a deficient number, since it is larger than the sum of its proper divisors (1).

140078989 is an equidigital number, since it uses as much as digits as its factorization.

140078989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 140078989 is about 11835.4969899874. The cubic root of 140078989 is about 519.3470465671.

The spelling of 140078989 in words is "one hundred forty million, seventy-eight thousand, nine hundred eighty-nine".