139743406 has 8 divisors (see below), whose sum is σ = 228671064. Its totient is φ = 63519720.

The previous prime is 139743379. The next prime is 139743481. The reversal of 139743406 is 604347931.

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

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 3 ways as a sum of consecutive naturals, for example, 3175965 + ... + 3176008.

It is an arithmetic number, because the mean of its divisors is an integer number (28583883).

Almost surely, 2^139743406 is an apocalyptic number.

139743406 is a deficient number, since it is larger than the sum of its proper divisors (88927658).

139743406 is a wasteful number, since it uses less digits than its factorization.

139743406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6351986.

The product of its (nonzero) digits is 54432, while the sum is 37.

The square root of 139743406 is about 11821.3115177632. The cubic root of 139743406 is about 518.9319869345.

The spelling of 139743406 in words is "one hundred thirty-nine million, seven hundred forty-three thousand, four hundred six".