139568437 has 8 divisors (see below), whose sum is σ = 141848000. Its totient is φ = 137294784.

The previous prime is 139568423. The next prime is 139568441. The reversal of 139568437 is 734865931.

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 139568437 - 2¹¹ = 139566389 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 (139568137) 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, 92989 + ... + 94477.

It is an arithmetic number, because the mean of its divisors is an integer number (17731000).

Almost surely, 2^139568437 is an apocalyptic number.

It is an amenable number.

139568437 is a deficient number, since it is larger than the sum of its proper divisors (2279563).

139568437 is a wasteful number, since it uses less digits than its factorization.

139568437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2955.

The product of its digits is 544320, while the sum is 46.

The square root of 139568437 is about 11813.9086250064. The cubic root of 139568437 is about 518.7153161695.

The spelling of 139568437 in words is "one hundred thirty-nine million, five hundred sixty-eight thousand, four hundred thirty-seven".