139743407 has 8 divisors (see below), whose sum is σ = 141927552. Its totient is φ = 137565400.

The previous prime is 139743379. The next prime is 139743481. The reversal of 139743407 is 704347931.

It is a happy number.

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 139743407 - 2⁶ = 139743343 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 (139743007) 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, 67928 + ... + 69954.

It is an arithmetic number, because the mean of its divisors is an integer number (17740944).

Almost surely, 2^139743407 is an apocalyptic number.

139743407 is a deficient number, since it is larger than the sum of its proper divisors (2184145).

139743407 is an equidigital number, since it uses as much as digits as its factorization.

139743407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3069.

The product of its (nonzero) digits is 63504, while the sum is 38.

The square root of 139743407 is about 11821.3115600597. The cubic root of 139743407 is about 518.9319881723.

The spelling of 139743407 in words is "one hundred thirty-nine million, seven hundred forty-three thousand, four hundred seven".