140207989 has 2 divisors, whose sum is σ = 140207990. Its totient is φ = 140207988.

The previous prime is 140207939. The next prime is 140208001. The reversal of 140207989 is 989702041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138839089 + 1368900 = 11783^2 + 1170^2 .

It is a cyclic number.

It is not a de Polignac number, because 140207989 - 2¹⁵ = 140175221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (140207929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70103994 + 70103995.

It is an arithmetic number, because the mean of its divisors is an integer number (70103995).

Almost surely, 2^140207989 is an apocalyptic number.

It is an amenable number.

140207989 is a deficient number, since it is larger than the sum of its proper divisors (1).

140207989 is an equidigital number, since it uses as much as digits as its factorization.

140207989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 140207989 is about 11840.9454436713. The cubic root of 140207989 is about 519.5064214415.

The spelling of 140207989 in words is "one hundred forty million, two hundred seven thousand, nine hundred eighty-nine".