139051409 has 8 divisors (see below), whose sum is σ = 160374720. Its totient is φ = 118092816.

The previous prime is 139051403. The next prime is 139051417. The reversal of 139051409 is 904150931.

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 139051409 - 2²⁴ = 122274193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (139051403) 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, 90359 + ... + 91884.

It is an arithmetic number, because the mean of its divisors is an integer number (20046840).

Almost surely, 2^139051409 is an apocalyptic number.

It is an amenable number.

139051409 is a deficient number, since it is larger than the sum of its proper divisors (21323311).

139051409 is a wasteful number, since it uses less digits than its factorization.

139051409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182359.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 139051409 is about 11792.0061482345. The cubic root of 139051409 is about 518.0740006978.

The spelling of 139051409 in words is "one hundred thirty-nine million, fifty-one thousand, four hundred nine".