139705437 has 8 divisors (see below), whose sum is σ = 192282880. Its totient is φ = 90132480.

The previous prime is 139705411. The next prime is 139705453. The reversal of 139705437 is 734507931.

It is a happy number.

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

It is not a de Polignac number, because 139705437 - 2⁶ = 139705373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 139705395 and 139705404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139705487) 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, 751012 + ... + 751197.

It is an arithmetic number, because the mean of its divisors is an integer number (24035360).

Almost surely, 2^139705437 is an apocalyptic number.

It is an amenable number.

139705437 is a deficient number, since it is larger than the sum of its proper divisors (52577443).

139705437 is a wasteful number, since it uses less digits than its factorization.

139705437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1502243.

The product of its (nonzero) digits is 79380, while the sum is 39.

The square root of 139705437 is about 11819.7054531828. The cubic root of 139705437 is about 518.8849838499.

The spelling of 139705437 in words is "one hundred thirty-nine million, seven hundred five thousand, four hundred thirty-seven".