139802989 has 8 divisors (see below), whose sum is σ = 143462592. Its totient is φ = 136155360.

The previous prime is 139802987. The next prime is 139803017. The reversal of 139802989 is 989208931.

139802989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 139802989 - 2¹ = 139802987 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 (139802987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23712 + ... + 29014.

It is an arithmetic number, because the mean of its divisors is an integer number (17932824).

Almost surely, 2^139802989 is an apocalyptic number.

It is an amenable number.

139802989 is a deficient number, since it is larger than the sum of its proper divisors (3659603).

139802989 is an equidigital number, since it uses as much as digits as its factorization.

139802989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5987.

The product of its (nonzero) digits is 279936, while the sum is 49.

The square root of 139802989 is about 11823.8314010307. The cubic root of 139802989 is about 519.0057295462.

The spelling of 139802989 in words is "one hundred thirty-nine million, eight hundred two thousand, nine hundred eighty-nine".