139609430 has 32 divisors (see below), whose sum is σ = 263098368. Its totient is φ = 53272800.

The previous prime is 139609429. The next prime is 139609447. The reversal of 139609430 is 34906931.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18839 + ... + 25181.

It is an arithmetic number, because the mean of its divisors is an integer number (8221824).

Almost surely, 2^139609430 is an apocalyptic number.

139609430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

139609430 is a deficient number, since it is larger than the sum of its proper divisors (123488938).

139609430 is a wasteful number, since it uses less digits than its factorization.

139609430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6452.

The product of its (nonzero) digits is 17496, while the sum is 35.

The square root of 139609430 is about 11815.6434441803. The cubic root of 139609430 is about 518.7660955958.

The spelling of 139609430 in words is "one hundred thirty-nine million, six hundred nine thousand, four hundred thirty".