139037889 has 8 divisors (see below), whose sum is σ = 185517760. Its totient is φ = 92624976.

The previous prime is 139037881. The next prime is 139037903. The reversal of 139037889 is 988730931.

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

It is not a de Polignac number, because 139037889 - 2³ = 139037881 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (139037881) 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, 11674 + ... + 20355.

It is an arithmetic number, because the mean of its divisors is an integer number (23189720).

Almost surely, 2^139037889 is an apocalyptic number.

It is an amenable number.

139037889 is a deficient number, since it is larger than the sum of its proper divisors (46479871).

139037889 is a wasteful number, since it uses less digits than its factorization.

139037889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33479.

The product of its (nonzero) digits is 326592, while the sum is 48.

The square root of 139037889 is about 11791.4328645844. The cubic root of 139037889 is about 518.0572093361.

The spelling of 139037889 in words is "one hundred thirty-nine million, thirty-seven thousand, eight hundred eighty-nine".